Works by Haapala, Eero A.

Results: 75

Physical Activity in Children and Young Adults With Cerebral Palsy: Results From a Three‐Month Exercise Intervention.

Published in:

European Journal of Sport Science, 2025, v. 25, n. 5, p. 1, doi. 10.1002/ejsc.12313

By:

Savikangas, Tiina;
Valadão, Pedro;
Haapala, Eero A.;
Laatikainen‐Raussi, Iida;
Rantalainen, Timo;
Finni, Taija

Publication type:

Article

Associations of Physical Fitness During Childhood with Arterial Structure and Stiffness in Adolescence: An 8-Year Follow-up Study.

Published in:

Sports Medicine - Open, 2025, v. 11, n. 1, p. 1, doi. 10.1186/s40798-025-00841-w

By:

Laitinen, Emilia;
Soininen, Sonja;
Leppänen, Marja H.;
Waller, Katja;
Bond, Bert;
Lintu, Niina;
Faigenbaum, Avery D.;
Laitinen, Tomi;
Haapala, Eero A.;
Lakka, Timo A.

Publication type:

Article

Cardiopulmonary Exercise Testing in Pediatrics.

Published in:

2017

By:

Takken, Tim;
Bongers, Bart C.;
van Brussel, Marco;
Haapala, Eero A.;
Hulzebos, Erik H. J.;
Hulzebos, Erik Hj

Publication type:

journal article

Associations of cardiometabolic risk factors with heart rate variability in 6‐ to 8‐year‐old children: The PANIC Study.

Published in:

Pediatric Diabetes, 2020, v. 21, n. 2, p. 251, doi. 10.1111/pedi.12967

By:

Leppänen, Marja H.;
Haapala, Eero A.;
Veijalainen, Aapo;
Seppälä, Santeri;
Oliveira, Ricardo S.;
Lintu, Niina;
Laitinen, Tomi;
Tarvainen, Mika P.;
Lakka, Timo A.

Publication type:

Article

Relationships of BMI, muscle-to-fat ratio, and handgrip strength-to-BMI ratio to physical fitness in Spanish children and adolescents.

Published in:

European Journal of Pediatrics, 2023, v. 182, n. 5, p. 2345, doi. 10.1007/s00431-023-04887-4

By:

Manzano-Carrasco, Samuel;
Garcia-Unanue, Jorge;
Haapala, Eero A.;
Felipe, Jose Luis;
Gallardo, Leonor;
Lopez-Fernandez, Jorge

Publication type:

Article

Health-related correlates of psychological well-being among girls and boys 6-8 years of age: The Physical Activity and Nutrition in Children study.

Published in:

2018

By:

Ikävalko, Tiina;
Lehto, Soili;
Lintu, Niina;
Väistö, Juuso;
Eloranta, Aino‐Maija;
Haapala, Eero A.;
Vierola, Anu;
Myllykangas, Riitta;
Tuomilehto, Henri;
Brage, Soren;
Pahkala, Riitta;
Närhi, Matti;
Lakka, Timo A.;
Eloranta, Aino-Maija

Publication type:

journal article

Mediating effects of motor performance, cardiorespiratory fitness, physical activity, and sedentary behaviour on the associations of adiposity and other cardiometabolic risk factors with academic achievement in children.

Published in:

Journal of Sports Sciences, 2018, v. 36, n. 20, p. 2296, doi. 10.1080/02640414.2018.1449562

By:

Haapala, Eero A.;
Lintu, Niina;
Eloranta, Aino-Maija;
Venäläinen, Taisa;
Poikkeus, Anna-Maija;
Ahonen, Timo;
Lindi, Virpi;
Lakka, Timo A.

Publication type:

Article

Adiposity, physical activity and neuromuscular performance in children.

Published in:

Journal of Sports Sciences, 2016, v. 34, n. 18, p. 1699, doi. 10.1080/02640414.2015.1134805

By:

Haapala, Eero A.;
Väistö, Juuso;
Lintu, Niina;
Tompuri, Tuomo;
Brage, Soren;
Westgate, Kate;
Ekelund, Ulf;
Lampinen, Eeva-Kaarina;
Sääkslahti, Arja;
Lindi, Virpi;
Lakka, Timo A.

Publication type:

Article

Identifying adolescents with increased cardiometabolic risk--Simple, but challenging.

Published in:

Jornal de Pediatria, 2025, v. 101, n. 1, p. 1, doi. 10.1016/j.jped.2024.10.001

By:

Haapala, Eero A.

Publication type:

Article

Associations between cardiorespiratory fitness, motor competence, and adiposity in children.

Published in:

Translational Sports Medicine, 2021, v. 4, n. 1, p. 56, doi. 10.1002/tsm2.198

By:

Haapala, Eero A.;
Gao, Ying;
Lintu, Niina;
Väistö, Juuso;
Vanhala, Anssi;
Tompuri, Tuomo;
Lakka, Timo A.;
Finni, Taija

Publication type:

Article

Associations of Cardiovascular Health Metrics in Childhood and Adolescence With Arterial Health Indicators in Adolescence: The PANIC Study.

Published in:

Journal of the American Heart Association, 2024, v. 13, n. 22, p. 1, doi. 10.1161/JAHA.124.035790

By:

Kraav, Juta;
Zagura, Maksim;
Viitasalo, Anna;
Soininen, Sonja;
Veijalainen, Aapo;
Kähönen, Mika;
Jürimäe, Jaak;
Tillmann, Vallo;
Haapala, Eero;
Lakka, Timo

Publication type:

Article

Accumulating Sedentary Time and Physical Activity From Childhood to Adolescence and Cardiac Function in Adolescence.

Published in:

Journal of the American Heart Association, 2024, v. 13, n. 6, p. 1, doi. 10.1161/JAHA.123.031837

By:

Haapala, Eero A.;
Leppänen, Marja H.;
Lee, Earric;
Savonen, Kai;
Laukkanen, Jari A.;
Kähönen, Mika;
Brage, Soren;
Lakka, Timo A.

Publication type:

Article

Associations of fitness, motor competence, and adiposity with the indicators of physical activity intensity during different physical activities in children.

Published in:

Scientific Reports, 2021, v. 11, n. 1, p. 1, doi. 10.1038/s41598-021-92040-2

By:

Haapala, Eero A.;
Gao, Ying;
Hartikainen, Jani;
Rantalainen, Timo;
Finni, Taija

Publication type:

Article

Validity of traditional physical activity intensity calibration methods and the feasibility of self-paced walking and running on individualised calibration of physical activity intensity in children.

Published in:

Scientific Reports, 2020, v. 10, n. 1, p. 1, doi. 10.1038/s41598-020-67983-7

By:

Haapala, Eero A.;
Gao, Ying;
Vanhala, Anssi;
Rantalainen, Timo;
Finni, Taija

Publication type:

Article

Associations of diet quality and food consumption with serum biomarkers for lipid and amino acid metabolism in Finnish children: the PANIC study.

Published in:

European Journal of Nutrition, 2024, v. 63, n. 2, p. 623, doi. 10.1007/s00394-023-03293-8

By:

Laamanen, Suvi E.;
Eloranta, Aino-Maija;
Haapala, Eero A.;
Sallinen, Taisa;
Schwab, Ursula;
Lakka, Timo A.

Publication type:

Article

The effects of a 2-year physical activity and dietary intervention on plasma lipid concentrations in children: the PANIC Study.

Published in:

European Journal of Nutrition, 2021, v. 60, n. 1, p. 425, doi. 10.1007/s00394-020-02260-x

By:

Eloranta, Aino-Maija;
Sallinen, Taisa;
Viitasalo, Anna;
Lintu, Niina;
Väistö, Juuso;
Jalkanen, Henna;
Tompuri, Tuomo T.;
Soininen, Sonja;
Haapala, Eero A.;
Kiiskinen, Sanna;
Schnurr, Theresia M.;
Kilpeläinen, Tuomas O.;
Mikkonen, Santtu;
Savonen, Kai;
Atalay, Mustafa;
Brage, Soren;
Laaksonen, David E.;
Lindi, Virpi;
Ågren, Jyrki;
Schwab, Ursula

Publication type:

Article

Diet quality and academic achievement: a prospective study among primary school children.

Published in:

European Journal of Nutrition, 2017, v. 56, n. 7, p. 2299, doi. 10.1007/s00394-016-1270-5

By:

Haapala, Eero;
Eloranta, Aino-Maija;
Venäläinen, Taisa;
Jalkanen, Henna;
Poikkeus, Anna-Maija;
Ahonen, Timo;
Lindi, Virpi;
Lakka, Timo

Publication type:

Article

Sedentary Thresholds for Accelerometry-Based Mean Amplitude Deviation and Electromyography Amplitude in 7–11 Years Old Children.

Published in:

Frontiers in Physiology, 2019, p. 1, doi. 10.3389/fphys.2019.00997

By:

Gao, Ying;
Haapala, Eero A.;
Vanhala, Anssi;
Sääkslahti, Arja;
Rantakokko, Merja;
Laukkanen, Arto;
Pesola, Arto J.;
Rantalainen, Timo;
Finni, Taija

Publication type:

Article

Longitudinal associations of an exposome score with serum metabolites from childhood to adolescence.

Published in:

Communications Biology, 2024, v. 7, n. 1, p. 1, doi. 10.1038/s42003-024-06146-0

By:

Healy, Darren R.;
Zarei, Iman;
Mikkonen, Santtu;
Soininen, Sonja;
Viitasalo, Anna;
Haapala, Eero A.;
Auriola, Seppo;
Hanhineva, Kati;
Kolehmainen, Marjukka;
Lakka, Timo A.

Publication type:

Article

Associations between physical activity, motor skills, executive functions and early numeracy in preschoolers.

Published in:

European Journal of Sport Science, 2023, v. 23, n. 7, p. 1385, doi. 10.1080/17461391.2022.2092777

By:

Vanhala, Anssi;
Haapala, Eero A.;
Sääkslahti, Arja;
Hakkarainen, Airi;
Widlund, Anna;
Aunio, Pirjo

Publication type:

Article

Associations of physical activity, sedentary time, and diet quality with biomarkers of inflammation in children.

Published in:

European Journal of Sport Science, 2022, v. 22, n. 6, p. 906, doi. 10.1080/17461391.2021.1892830

By:

Haapala, Eero A.;
Väistö, Juuso;
Ihalainen, Johanna K.;
González, Claudia Tomaselli;
Leppänen, Marja H.;
Veijalainen, Aapo;
Sallinen, Taisa;
Eloranta, Aino-Maija;
Ekelund, Ulf;
Schwab, Ursula;
Brage, Soren;
Atalay, Mustafa;
Lakka, Timo A.

Publication type:

Article

Physical activity, sedentary behaviour, and socioeconomic status among Finnish girls and boys aged 6–8 years.

Published in:

European Journal of Sport Science, 2017, v. 17, n. 4, p. 462, doi. 10.1080/17461391.2017.1294619

By:

Lampinen, Eeva-Kaarina;
Eloranta, Aino-Maija;
Haapala, Eero A.;
Lindi, Virpi;
Väistö, Juuso;
Lintu, Niina;
Karjalainen, Panu;
Kukkonen-Harjula, Katriina;
Laaksonen, David;
Lakka, Timo A.

Publication type:

Article

Effects of multicomponent exercise intervention on cardiometabolic risk factors in children and young adults with cerebral palsy: a multiple-baseline trial.

Published in:

BMC Sports Science, Medicine & Rehabilitation, 2024, v. 16, n. 1, p. 1, doi. 10.1186/s13102-024-01006-0

By:

Savikangas, Tiina;
Valadão, Pedro;
Haapala, Eero A.;
Finni, Taija

Publication type:

Article

Cardiorespiratory Fitness and Motor Skills in Relation to Cognition and Academic Performance in Children -- A Review.

Published in:

Journal of Human Kinetics, 2013, v. 37, p. 55, doi. 10.2478/hukin-2013-0006

By:

Haapala, Eero A.

Publication type:

Article

Cardiorespiratory Fitness and Motor Skills in Relation to Cognition and Academic Performance in Children -- A Review.

Published in:

Journal of Human Kinetics, 2013, v. 36, p. 55, doi. 10.2478/hukin-2013-0006

By:

Haapala, Eero A.

Publication type:

Article

Associations of physical fitness with cortical inhibition and excitation in adolescents and young adults.

Published in:

Frontiers in Neuroscience, 2024, p. 01, doi. 10.3389/fnins.2024.1297009

By:

Skog, Hanna Mari;
Määttä, Sara;
Säisänen, Laura;
Lakka, Timo A.;
Haapala, Eero A.

Publication type:

Article

Cross-sectional and longitudinal associations between the 24-hour movement behaviours, including muscle and bone strengthening activity, with bone and lean mass from childhood to adolescence.

Published in:

BMC Public Health, 2024, v. 24, n. 1, p. 1, doi. 10.1186/s12889-024-17711-x

By:

Skinner, Annie M.;
Barker, Alan R.;
Moore, Sarah A.;
Soininen, Sonja;
Haapala, Eero A.;
Väistö, Juuso;
Westgate, Kate;
Brage, Soren;
Lakka, Timo A.;
Vlachopoulos, Dimitris

Publication type:

Article

Associations of Cardiorespiratory Fitness and Adiposity With Arterial Stiffness and Arterial Dilatation Capacity in Response to a Bout of Exercise in Children.

Published in:

Pediatric Exercise Science, 2019, v. 31, n. 2, p. 238, doi. 10.1123/pes.2018-0145

By:

Agbaje, Andrew O.;
Haapala, Eero A.;
Lintu, Niina;
Viitasalo, Anna;
Väistö, Juuso;
Khan, Sohaib;
Veijalainen, Aapo;
Tompuri, Tuomo;
Laitinen, Tomi;
Lakka, Timo A.

Publication type:

Article

Associations of Objectively Measured Physical Activity and Sedentary Time With Arterial Stiffness in Pre-Pubertal Children.

Published in:

Pediatric Exercise Science, 2017, v. 29, n. 3, p. 326, doi. 10.1123/pes.2016-0168

By:

Haapala, Eero A.;
Väistö, Juuso;
Veijalainen, Aapo;
Lintu, Niina;
Wiklund, Petri;
Westgate, Kate;
Ekelund, Ulf;
Lindi, Virpi;
Brage, Soren;
Lakka, Timo A.

Publication type:

Article

A 2 year physical activity and dietary intervention attenuates the increase in insulin resistance in a general population of children: the PANIC study.

Published in:

Diabetologia, 2020, v. 63, n. 11, p. 2270, doi. 10.1007/s00125-020-05250-0

By:

Lakka, Timo A.;
Lintu, Niina;
Väistö, Juuso;
Viitasalo, Anna;
Sallinen, Taisa;
Haapala, Eero A.;
Tompuri, Tuomo T.;
Soininen, Sonja;
Karjalainen, Panu;
Schnurr, Theresia M.;
Mikkonen, Santtu;
Atalay, Mustafa;
Kilpeläinen, Tuomas O.;
Laitinen, Tomi;
Laaksonen, David E.;
Savonen, Kai;
Brage, Soren;
Schwab, Ursula;
Jääskeläinen, Jarmo;
Lindi, Virpi

Publication type:

Article

Reproducibility of pulse wave velocity and augmentation index derived from non‐invasive occlusive oscillometric tonometry analysis in adolescents.

Published in:

Clinical Physiology & Functional Imaging, 2019, v. 39, n. 1, p. 22, doi. 10.1111/cpf.12528

By:

Haapala, Eero A.;
Veijalainen, Aapo;
Kujala, Urho M.;
Finni, Taija

Publication type:

Article

Association between arterial health and cognition in adolescents: The PANIC study.

Published in:

Physiological Reports, 2024, v. 12, n. 9, p. 1, doi. 10.14814/phy2.16024

By:

Jalanko, Petri;
Bond, Bert;
Laukkanen, Jari A.;
Brage, Soren;
Ekelund, Ulf;
Laitinen, Tomi;
Määttä, Sara;
Kähönen, Mika;
Haapala, Eero A.;
Lakka, Timo A.

Publication type:

Article

The associations of depressive symptoms and perceived stress with arterial health in adolescents.

Published in:

Physiological Reports, 2024, v. 12, n. 6, p. 1, doi. 10.14814/phy2.15986

By:

Toivonen, Emmi;
Lee, Earric;
Leppänen, Marja H.;
Laitinen, Tomi;
Kähönen, Mika;
Lakka, Timo A.;
Haapala, Eero A.

Publication type:

Article

Associations of cardiorespiratory fitness, adiposity, and arterial stiffness with cognition in youth.

Published in:

Physiological Reports, 2020, v. 8, n. 18, p. 1, doi. 10.14814/phy2.14586

By:

Skog, Hannamari;
Lintu, Niina;
Haapala, Henna L.;
Haapala, Eero A.

Publication type:

Article

Associations of cardiorespiratory fitness, physical activity, and BMI with arterial health in middle‐aged men and women.

Published in:

Physiological Reports, 2020, v. 8, n. 10, p. 1, doi. 10.14814/phy2.14438

By:

Haapala, Eero A.;
Lee, Earric;
Laukkanen, Jari A.

Publication type:

Article

Evidence for protein leverage in a general population sample of children and adolescents.

Published in:

European Journal of Clinical Nutrition, 2023, v. 77, n. 6, p. 652, doi. 10.1038/s41430-023-01276-w

By:

Saner, Christoph;
Senior, Alistair M.;
Zhang, Hanyue;
Eloranta, Aino-Maija;
Magnussen, Costan G.;
Sabin, Matthew A.;
Juonala, Markus;
Janner, Marco;
Burgner, David P.;
Schwab, Ursula;
Haapala, Eero A.;
Heitmann, Berit L.;
Simpson, Stephen J.;
Raubenheimer, David;
Lakka, Timo A.

Publication type:

Article

Childhood Physical Fitness as a Predictor of Cognition and Mental Health in Adolescence: The PANIC Study: The PANIC Study: E. A. Haapala et al.

Published in:

Sports Medicine, 2025, v. 55, n. 2, p. 487, doi. 10.1007/s40279-024-02107-z

By:

Haapala, Eero A.;
Leppänen, Marja H.;
Skog, Hannamari;
Lubans, David R.;
Viitasalo, Anna;
Lintu, Niina;
Jalanko, Petri;
Määttä, Sara;
Lakka, Timo A.

Publication type:

Article

Which indices of cardiorespiratory fitness are more strongly associated with brain health in children with overweight/obesity?

Published in:

Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2024, v. 34, n. 1, p. 1, doi. 10.1111/sms.14549

By:

Haapala, Eero A.;
Lubans, David R.;
Jaakkola, Timo;
Barker, Alan R.;
Plaza‐Florido, Abel;
Gracia‐Marco, Luis;
Solis‐Urra, Patricio;
Cadenas‐Sanchez, Cristina;
Esteban‐Cornejo, Irene;
Ortega, Francisco B.

Publication type:

Article

Associations between physical fitness and cerebellar gray matter volume in adolescents.

Published in:

Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2024, v. 34, n. 1, p. 1, doi. 10.1111/sms.14513

By:

Jalanko, Petri;
Säisänen, Laura;
Kallioniemi, Elisa;
Könönen, Mervi;
Lakka, Timo A.;
Määttä, Sara;
Haapala, Eero A.

Publication type:

Article

Effects of 2‐year dietary and physical activity intervention on cognition in children—a nonrandomized controlled trial.

Published in:

Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2023, v. 33, n. 11, p. 2340, doi. 10.1111/sms.14464

By:

Naveed, Sehrish;
Sallinen, Taisa;
Eloranta, Aino‐Maija;
Skog, Hannamari;
Jalkanen, Henna;
Brage, Soren;
Ekelund, Ulf;
Pentikäinen, Heikki;
Savonen, Kai;
Lakka, Timo A.;
Haapala, Eero A.

Publication type:

Article

Cross‐sectional associations between physical fitness and biomarkers of inflammation in children—The PANIC study.

Published in:

Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2023, v. 33, n. 6, p. 1000, doi. 10.1111/sms.14337

By:

Haapala, Eero A.;
Kuronen, Emmi;
Ihalainen, Johanna K.;
Lintu, Niina;
Leppänen, Marja H.;
Tompuri, Tuomo;
Atalay, Mustafa;
Schwab, Ursula;
Lakka, Timo A.

Publication type:

Article

Physical activity volume and intensity distribution in relation to bone, lean and fat mass in children.

Published in:

Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2023, v. 33, n. 3, p. 267, doi. 10.1111/sms.14255

By:

Skinner, Annie M.;
Vlachopoulos, Dimitris;
Barker, Alan R.;
Moore, Sarah A.;
Rowlands, Alex V.;
Soininen, Sonja;
Haapala, Eero A.;
Väistö, Juuso;
Westgate, Kate;
Brage, Soren;
Lakka, Timo A.

Publication type:

Article

Longitudinal and cross‐sectional associations of adherence to 24‐hour movement guidelines with cardiometabolic risk.

Published in:

Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2022, v. 32, n. 1, p. 255, doi. 10.1111/sms.14081

By:

Leppänen, Marja H.;
Haapala, Eero A.;
Väistö, Juuso;
Ekelund, Ulf;
Brage, Søren;
Kilpeläinen, Tuomas O.;
Lakka, Timo A.

Publication type:

Article

Longitudinal associations of physical activity and sedentary time with cardiometabolic risk factors in children.

Published in:

Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2019, v. 29, n. 1, p. 113, doi. 10.1111/sms.13315

By:

Väistö, Juuso;
Haapala, Eero A.;
Viitasalo, Anna;
Schnurr, Theresia M.;
Kilpeläinen, Tuomas O.;
Karjalainen, Panu;
Westgate, Kate;
Lakka, Hanna‐Maaria;
Laaksonen, David E.;
Ekelund, Ulf;
Brage, Søren;
Lakka, Timo A.

Publication type:

Article

Peak oxygen uptake cut‐points to identify children at increased cardiometabolic risk – The PANIC Study.

Published in:

Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2019, v. 29, n. 1, p. 16, doi. 10.1111/sms.13307

By:

Agbaje, Andrew O.;
Haapala, Eero A.;
Lintu, Niina;
Viitasalo, Anna;
Barker, Alan R.;
Takken, Tim;
Tompuri, Tuomo;
Lindi, Virpi;
Lakka, Timo A.

Publication type:

Article

Peak oxygen uptake, ventilatory threshold, and arterial stiffness in adolescents.

Published in:

2018

By:

Haapala, Eero A.;
Laukkanen, Jari A.;
Takken, Tim;
Kujala, Urho M.;
Finni, Taija

Publication type:

journal article

Childhood Lifestyle Behaviors and Mental Health Symptoms in Adolescence.

Published in:

JAMA Network Open, 2025, v. 8, n. 2, p. e2460012, doi. 10.1001/jamanetworkopen.2024.60012

By:

Haapala, Eero A.;
Leppänen, Marja H.;
Kosola, Silja;
Appelqvist-Schmidlechner, Kaija;
Kraav, Siiri-Liisi;
Jussila, Juuso J.;
Tolmunen, Tommi;
Lubans, David R.;
Eloranta, Aino-Maija;
Schwab, Ursula;
Lakka, Timo A.

Publication type:

Article

Longitudinal associations of physical activity, sedentary time, and cardiorespiratory fitness with arterial health in children – the PANIC study.

Published in:

Journal of Sports Sciences, 2021, v. 39, n. 17, p. 1980, doi. 10.1080/02640414.2021.1912450

By:

Korhonen, Marika;
Väistö, Juuso;
Veijalainen, Aapo;
Leppänen, Marja;
Ekelund, Ulf;
Laukkanen, Jari A.;
Brage, Soren;
Lintu, Niina;
Haapala, Eero A.;
Lakka, Timo A.

Publication type:

Article

Associations of age, body size, and maturation with physical activity intensity in different laboratory tasks in children.

Published in:

Journal of Sports Sciences, 2021, v. 39, n. 12, p. 1428, doi. 10.1080/02640414.2021.1876328

By:

Haapala, Eero A.;
Gao, Ying;
Rantalainen, Timo;
Finni, Taija

Publication type:

Article

Physical Activity, Academic Performance and Cognition in Children and Adolescents. A Systematic Review.

Published in:

Baltic Journal of Health & Physical Activity, 2012, v. 4, n. 1, p. 53, doi. 10.2478/v10131-012-0007-y

By:

Haapala, Eero

Publication type:

Article