Cengiz, Cemre, Ebru Aylar, and Esengül Yıldız. “Intuitive Development of the Concept of Integers Among Primary School Students”. International Electronic Journal of Elementary Education 11, no. 2 (January 8, 2019): 191–199. Accessed January 30, 2025. https://iejee.com/index.php/IEJEE/article/view/648.