GUIDI, F. Standardization and Confluence in Pure Lambda-Calculus Formalized for the Matita Theorem Prover. Journal of Formalized Reasoning, [S. l.], v. 5, n. 1, p. 1–25, 2012. DOI: 10.6092/issn.1972-5787/3392. Disponível em: https://jfr.unibo.it/article/view/3392. Acesso em: 29 sep. 2022.