On the composite of three irreducible morphisms over string algebras. São Paulo Journal of Mathematical Sciences, [S. l.], v. 4, n. 2, p. 189–208, 2010. DOI: 10.11606/issn.2316-9028.v4i2p189-208. Disponível em: https://www.revistas.usp.br/spjournal/article/view/54.. Acesso em: 29 abr. 2024.