Brkić, A., I. Švaljek, and V. Jenić. “Organisation of Suburban and Urban Railway Traffic in the Krapina-Zagorje County and the City of Zagreb”. Promet - Traffic&Transportation, Vol. 11, no. 4, 1, pp. 239-45, https://traffic.fpz.hr/index.php/PROMTT/article/view/1136.