Erhan Selçuk Hacıömeroğlu, Güney Hacıömeroğlu. 2018. “Examining Prospective Teachers’ Logical Reasoning Ability: The Longeot’s Test of Cognitive Development”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 9 (3):413-48. https://turcomat.org/index.php/turkbilmat/article/view/183.