Arminditya Fajri Akbar, Harry Budi Santoso, Panca O. Hadi Putra, and Satrio Bhaskoro Yudhoatmojo. “User Perception Analysis of Online Learning Platform ‘Zenius’ During the Coronavirus Pandemic Using Text Mining Techniques”. Jurnal Sistem Informasi 17, no. 2 (October 25, 2021): 33-47. Accessed November 30, 2021. https://jsi.cs.ui.ac.id/index.php/jsi/article/view/1065.