Pejanović, Radovan, Mirela Tomaš, Danica Glavaš-Trbić, and Zoran Njegovan. 2011. “ORGANIC PRODUCTION IN THE DANUBE REGION”. Ekonomika Poljoprivrede 58 (1 Book 1):220-27. https://ea.bg.ac.rs/index.php/EA/article/view/830.