Foryś, A., and A.S. Foryś. “Internal and Combination Resonances in a Kinematically Excited System of Non-Prismatic Rods”. Engineering Transactions 43, no. 1-2 (July 1, 1995): 113–136. Accessed June 9, 2025. https://et3.ippt.pan.pl/index.php/et/article/view/1488.