Gian, Yohanes, Natalia, and Marhami. “Modeling Monthly Internet Data Package Expenditures Using the Numerical Method of Inverse Matrices”. EduMatSains : Jurnal Pendidikan, Matematika dan Sains 11, no. 2 (October 31, 2026): 387–397. Accessed November 2, 2026. https://ejournal.uki.ac.id/index.php/edumatsains/article/view/7790.