Petkovski, Dime, Ljupčo Melovski, and Rada Stojanovska-Petkovska. “The Content of Some Heavy Metals in the Wheat Grain Grown on Ovche Pole Chernozems”. Macedonian Journal of Ecology and Environment 5, no. 1 (August 31, 1997): 35–40. Accessed May 6, 2024. https://mjee.org.mk/index.php/mjee/article/view/47.