1. CEN. EN 1992-1-1, Eurocode 2: Design of concrete structures, Part 1.1: General rules and rules for buildings, Brussels, Belgium: Comité Européen de Normalisation; 2004.
2. Design criteria for reinforced columns under axial load and biaxial bending;Bresler;Journal of the American Concrete Institute.,1960
3. Analysis and Design of Square and Rectangular Columns by Equation of Failure Surface;Hsu;ACI Struct J,1988
4. Short reinforced concrete column capacity under biaxial and axial load;Hong;Can J Civ Eng,2000
5. Appraisal of Reciprocal Load Method for Reinforced Concrete Columns of Normal and High Strength Concrete;Wang;J Struct Eng,2002