CHARTRAND, GARY; MYNHARDT, CHRISTINA M; SABA, FARROKH. On least common multiples of digraphs. Utilitas Mathematica , [S. l.], v. 49, 1996. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/22. Acesso em: 8 may. 2026.