Elisabeth, M., 		Sudiarta, P., & 		Djuni, I.
(2019).
 Analysis of International Mobile Roaming Services with Smart Call Assistant System in GSM Originating Call.
<em>Journal Of Electrical, Electronics And Informatics, 3</em>(1), 30-34.
doi:10.24843/JEEI.2019.v03.i01.p06