Csima, F. and Borbély, Ákos (2010) “Trend calculation of quantitative and qualitative factors in sugar beet production until 2015”, REGIONAL AND BUSINESS STUDIES, 2(2), pp. 7–15. Available at: https://journal.uni-mate.hu/index.php/rbs/article/view/427 (Accessed: 5 December 2025).