Fahmizal Fahmizal, Muhammad Arrofiq Mail, and Afrizal Mayub. “Identifikasi Pemodelan Matematis Robot Wall Following”. Jurnal Nasional Teknik Elektro Dan Teknologi Informasi, Vol. 7, no. 1, Mar. 2018, pp. 79-88, https://jurnal.ugm.ac.id/v3/JNTETI/article/view/2796.