Bojovic, Z., Z. Peric, V. Delic, E. Secerov, M. Secujski, and V. Senk. 2012. “Comparative Analysis of the Performance of Different Codecs in a Live VoIP Network Using SIP Protocol”. Elektronika Ir Elektrotechnika 117 (1):37-42. https://doi.org/10.5755/j01.eee.117.1.1050.