BulkováZdenka, GašparíkJozef, DedíkMilan, and KampfRudolf. “Implementation of COVID-19 Measures in Railway Operation in the Slovak Republic”. Cognitive Sustainability 1, no. 2 (June 30, 2022). Accessed October 26, 2025. https://ojs.mtak.hu/index.php/CogSust/article/view/20399.