Sobczak P. 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. fso [Internet]. 2014 Dec. 14 [cited 2026 Sep. 18];2(4):77-90. Available from: https://ojs.wsb.edu.pl/index.php/fso/article/view/291