HULICKI, Z. Telecommunications in Poland - Infrastructure, market and services. Journal of Telecommunications and the Digital Economy, [S. l.], v. 4, n. 4, p. 234–250, 2017. DOI: 10.18080/jtde.v4n4.73. Disponível em: https://jtde.telsoc.org/index.php/jtde/article/view/73. Acesso em: 27 nov. 2024.