BUTKEVIČIUS, Jonas. The strategy of passenger transportation by national railway transport: The implementation of public service obligations. Transport, [S. l.], v. 24, n. 2, p. 180–186, 2009. DOI: 10.3846/1648-4142.2009.24.180-186. Disponível em: https://journals.vilniustech.lt/index.php/Transport/article/view/6284. Acesso em: 12 aug. 2025.