Setiawan, Muhammad Ilham, Novian Anggis Suwastika, and Sidik Prabowo. “IoT-Based Kobela Teaching Aid for Mathematics Learning Multiplication and Division Materials for Grade II Elementary School Students”. JURNAL MEDIA INFORMATIKA BUDIDARMA 5, no. 3 (July 31, 2021): 1142–1149. Accessed April 15, 2026. https://ejurnal.stmik-budidarma.ac.id/index.php/mib/article/view/3107.