Wissiak Grm, Katarina, and Iztok Devetak. “The Influence of Active Learning and Submicrorepresentations on 14-Year-Old Students Understanding of the Alkaline Earth Metal Concepts: Scientific Paper”. Journal of the Serbian Chemical Society 87, no. 2 (November 12, 2021): 275–290. Accessed April 24, 2024. https://shd-pub.org.rs/index.php/JSCS/article/view/10580.