HOLVAD, T. An Analysis of Efficiency Patterns for a sample of Norwegian Bus Companies. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 8, n. 1, 2001. DOI: 10.5278/ojs.td.v8i1.4743. Disponível em: https://journals.aau.dk/index.php/td/article/view/4743. Acesso em: 28 apr. 2024.