1. Ada, T., & Kurtuluş, A. (2010). Students’ misconceptions and errors in transformation geometry. International Journal of Mathematics Education in Science and Technology, 41(7), 901-909. https://doi.org/10.1080/0020739X.2010.486451
2. Agnes, D., Kaniawati, I., & Danawan, D. A. (2015). Analisis deskriptif tes tiga tingkat materi optika geometri dan alat optik [Descriptive analysis three-tier test geometry optics and optical instruments]. In D. Irwanto, F. T. Akbar, & A. H. Aimon (Eds.), Prosiding Simposium Nasional Inovasi dan Pembelajaran Sains [Proceedings of the National Symposium on Science Innovation and Learning] (pp. 597-600). Institut Teknologi Bandung. https://bit.ly/46ELEKQ
3. Agustyaningrum, N., Abadi, A. M., & Mahmudi, A. (2018). An analysis of students’ errors in solving abstract algebra tasks. Journal of Physics: Conference Series, 1097, Article 012118. https://doi.org/10.1088/1742-6596/1097/1/012118
4. Alacacı, C., Lewis, S., O’Brien, G. E., & Jiang, Z. (2011). Pre-service elementary teachers understanding of graphs. Eurasia Journal of Mathematics, Science and Technology Education, 7(1), 3-14. https://doi.org/10.12973/ejmste/75171
5. Arnal-Palacián, M., & Claros-Mellado, J. (2022). Specialized content knowledge of pre-service teachers on the infinite limit of a sequence. Mathematics Teaching Research Journal, 14(1), 169-189.