Prdić, Nedeljko Petko, Boris Kuzman, and Jelena Damjanović. “MARKETING RESEARCH IN THE FUNCTION OF BUSINESS EFFICIENCY”. Economics of Agriculture 66, no. 4 (December 25, 2019): 1039–1054. Accessed May 3, 2024. https://ea.bg.ac.rs/index.php/EA/article/view/1590.