1. Chen WF, Atsuta T. Theory of beam-columns: space behaviour and design. vol. 2. New York: McGraw-Hill; 1977
2. Kollbrunner FC, Basler K. Torsion. Berlin: Springer; 1966. p. 96–128
3. European Prestandard, Eurocode 3: design of steel structures, Part 1.1: general rules and rules for buildings. ENV 1993-1-1, 1992
4. Papp F. Computer aided design of steel beam-column structures. MTA Thesis for Candidate of Science PhD, Edinburgh–Budapest, 1995
5. Welded steel box-columns under biaxial loading;Shanmugam;J Const Steel Res,1989