Zheng, Xiaosong, and Petri Pulli. “User-Focused Reference Modelling for 3G and Beyond Mobile and Wireless Applications”. Computing and Informatics 25, no. 4 (January 30, 2012): 291–304. Accessed November 8, 2024. http://147.213.75.17/ojs/index.php/cai/article/view/343.