UHL, Tadeus; NOWICKI, Krzysztof; PAULSEN, Stefan. New Tool for Examining QoS in the VToIP Service. Journal of Telecommunications and Information Technology, Warsaw, Poland, v. 55, n. 1, p. 10–15, 2014. DOI: 10.26636/jtit.2014.1.997. Disponível em: https://jtit.pl/jtit/article/view/997. Acesso em: 3 aug. 2026.