Hoang That Ton, Lan. “Mode Shapes for Free Vibration of Clamped Plates With Various Geometries Based on an Quadrilateral Element”. International Journal of Engineering and Applied Physics 5, no. 2 (May 25, 2025): 1179–1183. Accessed July 15, 2025. https://ijeap.org/ijeap/article/view/263.