Tuğba Aydoğdu İskenderoğlu, İsmail Erkan, Ayşegül Serbest (2013) “Classification of SBS Mathematics Questions between 2008-2013 years with Respect to PISA Competency Levels”, Turkish Journal of Computer and Mathematics Education (TURCOMAT), 4(2), pp. 147–168. Available at: https://turcomat.org/index.php/turkbilmat/article/view/55 (Accessed: 3May2024).