QIAN, Shu; RAO, Samiha. Finding the Cheapest Way to Build a Graph. Mathematics Exchange, [S. l.], v. 18, n. 1, p. 26–50, 2025. DOI: 10.33043/92ra679d. Disponível em: https://openjournals.bsu.edu/mathexchange/article/view/5812. Acesso em: 28 apr. 2026.