Jaram, Slavko. “Odredbenice Modeliranja Suvremenoga Tarifnog Sustava U Telekomunikacijskom Prometu”. Promet - Traffic&Transportation 5, no. 2 (October 11, 2012): 63–67. Accessed August 27, 2025. https://traffic2.fpz.hr/index.php/PROMTT/article/view/1729.