1. Aksu, Z., & Kul, Ü. (2016). Exploring mathematics teachers’ pedagogical content knowledge in the context of knowledge of students. Journal of Education and Practice, 7(30), 35-42.
2. An, S., Kulm, G., & Wu, Z. (2004). The pedagogical content knowledge of middle school mathematics teachers in China and the U.S. Journal of Mathematics Teacher Education, 7, 145- 172.
3. Ball, D. L. (1990). Reflections and deflections of policy: The case of Carol Turner. Educational Evaluation and Policy Analysis, 12(3), 247-259.
4. Ball, D. L., & Bass, H. (2002). Toward a practice-based theory of mathematical knowledge for teaching. In Proceedings of the 2002 Annual Meeting of the Canadian Mathematics Education Study Group (pp. 3-14).
5. Ball, D. L., Thames, M. H. & Phelps, G. (2008). Content knowledge for teaching: What makes it special? Journal of Teacher Education, 59(5), 389- 407.