Institute of Agricultural Economics (IAE) Belgrade, Republic of Serbia, Petroleum and Gas University of Ploiesti, Institute of Agricultural Economics (IEA) Belgrade, Independent, Independent, Independent, Romanian Academy - Institute of National Economy, University of Novi Sad - Faculty of Natural and Mathematical Science, University of Novi Sad, University of Belgrade - Faculty of Agriculture, University of Belgrade - Faculty of Agriculture, University of Belgrade - Faculty of Agriculture, University of Kragujevac - Faculty of Agronomy, University of Kragujevac - Faculty of Agronomy, University of Belgrade - Faculty of Agriculture, University of Belgrade - Faculty of Agriculture, Independent, The European Center for Peace and Development of the UN University for Peace, University of Novi Sad - Technical Faculty, Belgrade Business School, University of Novi Sad - Technical Faculty, University of Kragujevac - Technical Faculty, University of Kragujevac, Independent, Independent, Institute of Agricultural Economics (IEA) Belgrade, Independent, University of Novi Sad - Agricultural Faculty, Economics Institute, Economics Institute, University of Belgrade - Faculty of Technology and Metallurgy, University of Novi Sad - Faculty of Agriculture, University of Novi Sad - Faculty of Agriculture, University of Novi Sad, University of Niš - Faculty of Sciences and Mathematics, Zarko Dimitrijevic PR Izvrsitelj Nis, University of Kragujevac - Faculty of Law, Independent, University of Banja Luka, University of Belgrade - Faculty of Agriculture, Independent, Independent, University of Belgrade - Faculty of Agriculture, Independent, University of Belgrade - Faculty of Agriculture, Institute of Agricultural Economics (IEA) Belgrade, Institute of Agricultural Economics (IEA) Belgrade, Independent, National Research Institute (PIB) - Institute of Agricultural and Food Economics - National Research Institute (IAFE-NRI) and Independent