Economic and Social Development. International Scientific Conference. Economic and Social Development : Book of Proceedings : 30th International Scientific Conference on Economic and Social Development : Belgrade, 25-26 May 2018. Editors: Khalid Hammes, Igor Klopotan, Milica Nestorovic. 1st edition. Varazdin : Varazdin Development and Entrepreneurship Agency ; Warsaw : Faculty of Management University of Warsaw ; Koprivnica : University North ; Rabat : Faculty of Law, Economics and Social Sciences Sale - Mohammed V University in Rabat, 2018. online 482 s. ISSN 1849-7535.