1. ACI Committee 318. Building code requirements for structural concrete (ACI-318-02). American Concrete Institute, Detroit, 2002.
2. European Committee for Standardization, EuroCode-2 (EC-2). Design of concrete structures—part 1: general rules and rules for buildings. September 2003.
3. Mavichak V, Furlong RW. Strength and stiffness of reinforced concrete columns under biaxial bending. Research report 7-2F. Center for Highway Research, The University of Texas at Austin, Texas, 1976.
4. Flexural stiffness of rectangular reinforced concrete columns;Mirza;ACI Structural Journal,1990
5. Flexural stiffness of composite columns subject to bending about minor axis of structural steel section core;Mirza;ACI Structural Journal,1999