Shortening of the Pittsburgh Sleep Quality Index Survey Using Factor Analysis.Published in:Urban Studies Research, 2018, p. 1, doi. 10.1155/2018/9643937By:Famodu, Oluremi A.;Barr, Makenzie L.;Holásková, Ida;Zhou, Wenjun;Morrell, Jesse S.;Colby, Sarah E.;Olfert, Melissa D.Publication type:Article