1. AASHTO LRFD Bridge Design Specifications;AASHTO,2001
2. Guide Specifications for Horizontally Curved Highway Bridges;AASHTO,2003
3. Curved webs under combined shear and normal stresses;Abdel Sayed;Journal of Structural Division, ASCE,1973
4. Load and Resistance Factor Design Specification for Structural Steel Buildings;AISC,1999
5. A simplified method of elastic stability analysis for thin cylindrical shells. II modified equilibrium equation;Batdorf,1947