Dikkartin Övez, Filiz Tuba, and Nazlı Akar. “The Investigation of Process of Teaching Function Concept in an Adidactic Learning Environment”. Pegem Journal of Education and Instruction 8, no. 3 (April 27, 2018): 469–502. Accessed May 4, 2024. https://pegegog.net/index.php/pegegog/article/view/pegegog.2018.019.