GRIMM, J. Implementation of Bourbaki’s Elements of Mathematics in Coq: Part One, Theory of Sets. Journal of Formalized Reasoning, [S. l.], v. 3, n. 1, p. 79–126, 2010. DOI: 10.6092/issn.1972-5787/1899. Disponível em: https://jfr.unibo.it/article/view/1899. Acesso em: 29 mar. 2024.