Brkić, Alojz, Ivan Švaljek, and Vinko Jenić. “Organisation of Suburban and Urban Railway Traffic in the Krapina-Zagorje County and the City of Zagreb”. Promet - Traffic&Transportation 11, no. 4 (1): 239-245. Accessed September 22, 2021. https://traffic.fpz.hr/index.php/PROMTT/article/view/1136.