ON THE NUMBER OF UNITAL SUBRINGS OF $C(X)$. JP Journal of Algebra, Number Theory and Applications, [S. l.], v. 63, n. 1, p. 55–64, 2024. DOI: 10.17654/0972555524003. Disponível em: https://pphmjopenaccess.com/jpjana/article/view/1115. Acesso em: 5 jan. 2026.