JAYARAM, C. $ \pi $-lattices. Tamkang Journal of Mathematics, [S. l.], v. 32, n. 4, p. 271–274, 2001. DOI: 10.5556/j.tkjm.32.2001.341. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/341. Acesso em: 3 may. 2024.