Izzuddin, B. A., Teh, L. H., & Clarke, M. J. (2000). Symmetry of Tangent Stiffness Matrices of 3D Elastic Frame. Journal of Engineering Mechanics, 126(6), 662-664. doi:10.1061/(asce)0733-9399(2000)126:6(662)
Izzuddin, B. A., Teh, L. H., & Clarke, M. J. (2000). Symmetry of Tangent Stiffness Matrices of 3D Elastic Frame. Journal of Engineering Mechanics, 126(6), 662-664. doi:10.1061/(asce)0733-9399(2000)126:6(662)