ContraSoft Set and ContraRough Set with using Upside-down logic. Statistics, Optimization & Information Computing, [S. l.], v. 14, n. 6, p. 3589–3632, 2025. DOI: 10.19139/soic-2310-5070-3022. Disponível em: https://www.iapress.org/index.php/soic/article/view/3022. Acesso em: 23 apr. 2026.