Tareq Al-Gizawi Kostas Peppas 0001 Dimitrios I. Axiotis Emmanuel N. Protonotarios Fotis I. Lazarakis Interoperability criteria, mechanisms, and evaluation of system performance for transparently interoperating WLAN and UMTS-HSDPA networks. 66-72 2005 19 IEEE Netw. 4 https://doi.org/10.1109/MNET.2005.1470685 db/journals/network/network19.html#Al-GizawiPAPL05