Elvanno Hatorangan, and Tutun Juhana. 2015. “Implementation of Telephony and SMS Services over OpenBTS-Based Cellular Networks in Disaster Situations”. Jurnal Nasional Teknik Elektro Dan Teknologi Informasi 4 (1):10-15. https://journal.ugm.ac.id/v3/JNTETI/article/view/3028.