ARTHAN, Robin Denis. Now f is continuous (exercise!). Journal of Formalized Reasoning, [S. l.], v. 9, n. 1, p. 33–52, 2016. DOI: 10.6092/issn.1972-5787/4566. Disponível em: https://jfr.unibo.it/article/view/4566. Acesso em: 4 apr. 2025.