GHIMIRE, S. An Alternative Proof of Rubin’s Lemma. Nepal Journal of Mathematical Sciences, [S. l.], v. 1, p. 51–54, 2020. DOI: 10.3126/njmathsci.v1i0.34162. Disponível em: https://www.nepjol.info/index.php/njmathsci/article/view/34162. Acesso em: 30 apr. 2024.