Ainoo, Laud Christian, and Erwin Normanyo. “Signal Lights-Based Light Vehicle Safe Movement on Underground Mine Ramps”. Jurnal Nasional Teknik Elektro 11, no. 2 (July 31, 2022). Accessed April 19, 2024. http://jnte.ft.unand.ac.id/index.php/jnte/article/view/977.