ELWakiel, Mohamed, Hesham ELBadawy, and Hadia Elhennawy. 2016. “Design of Quality of Service Parameters for Voice over Long Term Evolution ”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 28 (2): 107-25. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/5959.