TREVISANO, R. . Non-Trivial, Left-Covariant, Continuously Closed Paths over Lines. Mathematical Statistician and Engineering Applications, [S. l.], v. 70, n. 2, p. 111–119, 2021. DOI: 10.17762/msea.v70i2.19. Disponível em: https://www.philstat.org/index.php/MSEA/article/view/19. Acesso em: 20 apr. 2024.