Aydın Güç, F., and D. Aygün. “EIGHTH-GRADE STUDENTS’ ERRORS AND MISCONCEPTIONS REGARDING OPERATIONS WITH ALGEBRAIC EXPRESSIONS”. International Online Journal of Education and Teaching, vol. 8, no. 2, Jan. 2021, pp. 1106-2, https://iojet.org/index.php/IOJET/article/view/1238.