Đolić, Maja, Mirjana Ćujić, Tijana Stanišić, Dragana Čičkarić, Mirjana Ristić, and Aleksandra Perić Grujić. “Contribution to the Serbian Coal Ranking and Fly Ash Characterization Using Pb Isotopic Ratio”. Metallurgical and Materials Engineering 28, no. 4 (December 31, 2022): 675–684. Accessed March 29, 2024. https://metall-mater-eng.com/index.php/home/article/view/931.