PAWLAK, Zdzisław. Rough set theory and its applications. Journal of Telecommunications and Information Technology, Warsaw, Poland, v. 9, n. 3, p. 7–10, 2002. DOI: 10.26636/jtit.2002.140. Disponível em: https://www.jtit.pl/jtit/article/view/140. Acesso em: 10 jul. 2026.