CEJKA, Jiri; KAMPF, Rudolf. The Winter Maintenance Optimization by Graph Theory. Periodica Polytechnica Transportation Engineering, [S. l.], v. 47, n. 2, p. 106–110, 2019. 10.3311/PPtr.11170. Disponível em: https://pp.bme.hu/tr/article/view/11170. Acesso em: 22 jul. 2024.