Szirmai, V., A. A. Gergely, G. Baráth, B. Molnár, and Ákos Szépvölgyi. “The City and Its Environment: Competition and/Or Co-Operation? (A Hungarian Case Study)”. Discussion Papers, no. 41, July 2012, pp. 5-33, https://dp.ojs.rkk.hu/index.php/DP/article/view/2213.