SOBCZAK, Paweł. Changes in the schedule at the Koleje Śląskie sp. z o.o. and their impact on the operations of the carrier and sustainable transport in the silesia province. Forum Scientiae Oeconomia, [S. l.], v. 2, n. 4, p. 77–90, 2014. Disponível em: https://ojs.wsb.edu.pl/index.php/fso/article/view/291. Acesso em: 18 sep. 2026.