Safarik, Jakub, Miroslav Voznak, Filip Rezac, and Lukas Macura. “IP Telephony Server Emulation for Monitoring and Analysis of Malicious Activity in VOIP Network”. Communications - Scientific letters of the University of Zilina 15, no. 2A (July 31, 2013): 191-196. Accessed April 6, 2026. http://journals.uniza.sk/index.php/communications/article/view/679.