Nastić, Lana, Todor Marković, and Sanjin Ivanović. “ECONOMIC EFFICIENCY OF EXTENSIVE LIVESTOCK PRODUCTION IN THE EUROPEAN UNION”. Economic of Agriculture 64, no. 3 (September 30, 2017): 1219–1230. Accessed December 5, 2025. https://www.ea.bg.ac.rs/index.php/EA/article/view/85.