OLKUN, Sinan, Arif Altun, Sakine Göçer Şahin, and Galip Kaya. 2016. “Psychometric Properties of a Screening Tool for Elementary School Student’s Math Learning Disorder Risk”. International Journal of Learning, Teaching and Educational Research 15 (12):48-66. http://www.ijlter.net/index.php/ijlter/article/view/863.