1. Beeby AW. The design of sections for flexure and axial load according to CP110. Cement and Concrete Association, Development Report 2, 1978
2. BS8110. Structural use of concrete: Part 1. London: British Standards Institutions, 1985
3. CP110. Code of practice for structure use of use of concrete. London: British Standards Institutions, 1972
4. Design Handbook Vol. 2 Columns. Detroit, ACI Publication SP-17A(78), 1978
5. CP114. Code of practice for structure use of concrete. London, British Standards Institutions, 1965