N. CHANDRAMATHI; J.R. SUJITHRA. New sort of generalized closed sets using grills. Malaya Journal of Matematik, India, v. 7, n. 04, p. 813–817, 2019. DOI: 10.26637/MJM0704/0029. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/1274. Acesso em: 16 jul. 2024.