1Faculty of Agronomy, University of Kragujevac, Cara Dusana 34, 32000 Cacak, Serbia.
2Municipality of Niksic, Environmental Protection Service, Njegoseva 18, 81400 Niksic, Montenegro.
3Biotechnical Faculty, University of Podgorica, Bul. Mihaila Lalica 1, 81000 Podgorica, Montenegro.
4Fruit Research Institute, Kralja Petra I 9, 32000 Cacak, Serbia.
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