GÖKÇEK, T.; ÇELIK, S. A Meta-Synthesis Study of Research About Mathematic Textbooks. Pegem Journal of Education and Instruction, [S. l.], v. 10, n. 4, p. 1247–1288, 2021. DOI: 10.14527/pegegog.2020.038. Disponível em: https://pegegog.net/index.php/pegegog/article/view/1000. Acesso em: 21 aug. 2025.