THAKARE, N. K.; PAWAR, M. M.; WAPHARE, B. N. Modular Pairs, Standard Elements, Neutral Elements and Related Results in Partially Ordered Sets. The Journal of the Indian Mathematical Society, [S. l.], v. 71, n. 1-4, p. 13–53, 2004. Disponível em: http://www.informaticsjournals.com/index.php/jims/article/view/22027. Acesso em: 30 apr. 2024.