1. 3GPP TR 22.934 version 11.0.0 Release 11, Feasibility Study on 3GPP System to Wireless Local Area Network (WLAN) Interworking.
2. 3GPP TR 36.839 version 11.0.0 Release 11, Evolved Universal Terrestrial Radio Access (E-UTRA); Mobility enhancements in heterogeneous networks.
3. 3GPP TR 36.932 version 12.1.0 Release 12, LTE; Scenarios and requirements for small cell enhancements for E-UTRA and E-UTRAN.
4. 3GPP TS 22.278 version 8.5.0 Release 8, Service requirements for the Evolved Packet System (EPS).
5. Abbas, N., Saade, J.J. A fuzzy logic based approach for network selection in WLAN/3G heterogeneous network. In: Proceedings of the IEEE Consumer Communications and Networking Conference.