Буланов, В. В., and А. Г. Дибир. “Analysis of Free Oscillations of Construction Elements”. Proceedings of National Aviation University (archive) 7, no. 3-4 (December 15, 2000): 85–88. Accessed March 3, 2026. https://jrnl.nau.edu.ua/index.php/visnik/article/view/11269.