1. Crowd Disasters – A System Evaluation of Causes and Countermeasures;Fruin,1981
2. Crowd Ingress to Places of Assembly: Summary and Proceedings of an Experts’ Workshop;Ventre,1981
3. Pedestrian Planning and Design … A Bibliography;Bovy,1975
4. Pedestrian Planning and Design;Fruin,1971
5. Pedestrian Movement … A Bibliography;Garbecht,1971