TORRES GUARDIA, Luis Ernesto; LACERDA, Nelson N. Multiple objetive network flow problems. Pro Mathematica, [S. l.], v. 25, n. 49, p. 133–149, 2011. Disponível em: https://revistas.pucp.edu.pe/index.php/promathematica/article/view/2660. Acesso em: 24 dic. 2025.