Hrin, Tamara N., Dušica D. Milenković, and Mirjana D. Segedinac. “Examining Systems Thinking through the Application of Systemic Approach in the Secondary School Chemistry Teaching”. African Journal of Chemical Education 7, no. 3 (October 19, 2017): 66–81. Accessed October 13, 2026. https://www.ajol.info/index.php/ajce/article/view/162211.