Sumihar Simangunsong. “Analysis The Wave Equation Of The Dispersion Term On The Wave Group Velocity”. Jurnal Pengabdian Masyarakat dan Riset Pendidikan 4, no. 3 (February 9, 2026): 20051–20057. Accessed September 15, 2026. https://jerkin.org/index.php/jerkin/article/view/5440.