KRUPA, Wojciech. Classification of activities subject to entry in the register of telecommunications entrepreneurs. Ius Novum, Warszawa, Poland, v. 14, n. 4, p. 170–192, 2020. DOI: 10.26399/iusnovum.v14.4.2020.42/w.krupa. Disponível em: https://iusnovum.lazarski.pl/iusnovum/article/view/1187. Acesso em: 3 jul. 2024.