Improving Pilgrim Safety During the Hajj: An Analytical and Operational Research Approach.Published in:Interfaces, 2016, v. 46, n. 1, p. 74, doi. 10.1287/inte.2015.0833By:Haase, Knut;Al Abideen, Habib Zain;Al-Bosta, Salim;Kasper, Mathias;Koch, Matthes;Müller, Sven;Helbing, DirkPublication type:Article