RAHMAN, R. M. H. Study of Convex Sublattices of a Lattice by a New Approach. Journal of Scientific Research, [S. l.], v. 1, n. 3, p. 558–562, 2009. DOI: 10.3329/jsr.v1i3.2484. Disponível em: https://banglajol.info/index.php/JSR/article/view/2484. Acesso em: 8 dec. 2022.