Rachim, Dimas Kukuh Nur. “Study of The Lazy Nature of Physics Students Using The Quadratic Optimal Control Method ”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 6, no. 2 (December 31, 2020): 279 - 288. Accessed May 4, 2025. http://103.8.12.212:33180/unj/index.php/jpppf/article/view/16493.