1. 1. J. C. Ikuno, “UMTS Long-Term Evolution,” in Evaluation of HSDPA and LTE: From Testbed Measurements to System Level Performance, 2011, pp. 29–53.
   2. J. Sanchez and M. Thioune, UMTS. 2010.
   3.  Y. Chen et al., “Understanding the complexity of 3G UMTS network performance,” in 2013 IFIP Networking Conference, IFIP Networking 2013, 2013.
   4. P. A. Ochang and P. J. Irving, “Evolutionary Analysis of GSM , UMTS and LTE Mobile Network Architectures,” world Sci. New, 2016.
   5. H. Holma, M. Kristensson, J. Salonen, A. Toskala, and T. Uitto, “UMTS Services,” in WCDMA for UMTS: HSPA Evolution and LTE: Fifth Edition, 2010.
   6.  LTE - The UMTS Long Term Evolution. 2011.
   7. H. KAARANEN, A. AHTIAINEN, L. LAITINEN, and V. N. SIAMAK NAGHIAN, UMTS NETWORKS Architecture, Mobility and Services, vol. 53, no. 9. 2013.
   8.  H. Holma and A. Toskala, WCDMA for UMTS: HSPA Evolution and LTE: Fifth Edition. 2010