Popović, Vesna, Radojica Sarić, and Marijana Jovanović. “SUSTAINABILITY OF AGRICULTURE IN DANUBE BASIN AREA”. Economic of Agriculture 59, no. 1 (March 31, 2012): 73–87. Accessed December 5, 2025. https://www.ea.bg.ac.rs/index.php/EA/article/view/596.