Karkauskas, Romanas, and Michail Popov. “The Analysis of Geometrically Nonlinear Elastic-Plastic Space Frames”. Journal of Civil Engineering and Management 17, no. 4 (December 21, 2011): 558-568. Accessed July 6, 2024. https://jau.vgtu.lt/index.php/JCEM/article/view/5254.