Yasemin KATRANCI, and Sena YILDIZ. “Geometry Literacy Scale (GLS): Measuring of Pre-Service Mathematics Teachers’ Self-Perceived Competencies”. Pegem Journal of Education and Instruction, vol. 15, no. 2, Aug. 2026, pp. 1394-20, https://pegegog.net/index.php/pegegog/article/view/5303.