Hrin TN, Milenković DD, Segedinac MD. Examining systems thinking through the application of systemic approach in the secondary school chemistry teaching. Afr. J. Chem. Edu [Internet]. 2017 Oct. 19 [cited 2026 Oct. 8];7(3):66-81. Available from: https://www.ajol.info/index.php/ajce/article/view/162211