ANTONOWICZ, Mirosław. The Strategy of PKP S.A. as an Instrument of Polish Railway Transport Development. Transport Economics and Logistics, [S. l.], v. 82, p. 19–27, 2019. DOI: 10.26881/etil.2019.82.02. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/znetil/article/view/5364. Acesso em: 6 may. 2024.