Walczak, W., and S. Jakubowski. “The Stability and Post-Buckling State of a Rectangular Disk Under Unidirectional Bending and Simultaneous Shear”.
Engineering Transactions 27, no. 4 (December 30, 1979): 633–649. Accessed July 12, 2025.
https://et.ippt.pan.pl/index.php/et/article/view/2180.