1. The Building Regulations-Approved Document B - Section B1, 1992;Department of The Environment and The Welsh Office,1991
2. Pedestrian Planning and Design;Fruin,1971
3. The Green Guide Guide to Safety at Sports Grounds,1991
4. Passenger flow in subways;Hankin;Oper. Res. Quart.,1958
5. Evaluation of Fire Safety;Rasbash,2004