فهرس المقالات ZhiYuan Chen المقاله 1 - A Study of Fraud Types, Challenges and Detection Approaches in Telecommunication 10.7508/jist.2019.04.002 Kasra Babaei ZhiYuan Chen Tomas Maul Journal of Information Systems and Telecommunication (JIST) , العدد 4 , السنة 7 , پاییز 2019