Tasić, Aleksandra, Ivana Sredović Ignjatović, Ljubiša Ignjatović, Ivan Anđelković, Mališa Antić, and Ljubinka Rajakovic. “Investigation of Different Extraction Procedures for the Determination of Major and Trace Elements in Coal by ICP-AES and Ion Chromatography”. Journal of the Serbian Chemical Society 81, no. 4 (May 19, 2016): 403–417. Accessed May 7, 2024. https://www.shd-pub.org.rs/index.php/JSCS/article/view/427.