Pang, A.-C.A.-C.PangLin, Y.-B.Y.-B.LinChang, M.-F.M.-F.ChangAI-CHUN PANG2020-05-042020-05-042001https://scholars.lib.ntu.edu.tw/handle/123456789/487493GSM-IP: A VoIP service for mobile networksjournal article10.1002/wcm.19https://www.scopus.com/inward/record.uri?eid=2-s2.0-0347116262&doi=10.1002%2fwcm.19&partnerID=40&md5=59b57079c9249c2a75df68ca9112809b