Šimulčik, Damir, Ivan Bošnjak, and Marinko Jurčević. “Asymmetric Competition in Network Services Provision in the Telecommunications Subsystems”. Promet - Traffic&Transportation 10, no. 1-2 (October 11, 2012): 33–38. Accessed August 26, 2025. https://traffic2.fpz.hr/index.php/PROMTT/article/view/1850.