Siswanto, S., Helmy Ligaputra, M. Anif, Windu Gata and Basuki Hari Prasetyo (2020) “Expert System for Identifying Damages of Panasonic NS1000 PABX Devices with A* Pathfinding”, Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi), 4(3), pp. 558 - 568. doi: 10.29207/resti.v4i3.1882.