Krawczuk, Marek, Wiesław Ostachowicz, and Arkadiusz Żak. “Natural Vibration Frequencies of Delaminated Composite Beams”. Computer Assisted Methods in Engineering and Science 3, no. 3 (July 13, 2023): 233–243. Accessed January 12, 2025. https://cames3.ippt.pan.pl/index.php/cames/article/view/1444.