The following publications are possibly variants of this publication:
- A Pilgrim Scheduling Approach to Increase Safety During the HajjKnut Haase, Mathias Kasper, Matthes Koch, Sven Müller. ior, 67(2):376-406, 2019. [doi]
- Improving Pilgrim Safety During the Hajj: An Analytical and Operational Research ApproachKnut Haase, Habib Z. Al-Abideen, Salim Al-Bosta, Mathias Kasper, Matthes Koch, Sven Müller, Dirk Helbing. interfaces, 46(1):74-90, 2016. [doi]