Hutem, Artit. “Angular Displacement Angular Velocity and Tension Force of Particle in the Pendulum Motion under drag Force and Time-Dependent External Force”. Journal of Science and Technology CRRU 3, no. 1 (June 25, 2024): 48–65. accessed December 7, 2025. https://li01.tci-thaijo.org/index.php/jstcrru/article/view/262164.