HANCZEWSKI, Sławomir; KMIECIK, Damian. Properties of the Multiservice Erlang’s Ideal Gradings. Journal of Telecommunications and Information Technology, [S. l.], v. 63, n. 1, p. 37–43, 2016. DOI: 10.26636/jtit.2016.1.702. Disponível em: https://jtit.pl/jtit/article/view/702. Acesso em: 17 apr. 2026.