1. Goran Ostić (2013) "MULTIANNUAL DROUGHT OCCURRENCE AND ITS IMPACT ON MAIZE PRODUCTION IN REPUBLIC OF SRPSKA" - II međunarodni simpozijum i 18-to naučno-stručno savjetovanje agronoma Republike Srpske
(https://ekonferencije.com/sr1/rad/multiannual-drought-occurrence/2036)