1. Arnon, I., Nesher, P., & Nirenburg, R. (2001). Where do fractions encounter their equivalents? Can this encounter take place in elementary school? International Journal of Computers for Mathematical Learning, 6, 167–214.
2. Asiala, M., Brown, A., DeVries, D., Dubinsky, E., Mathews, D., & Thomas, K. (1996). A framework for research and curriculum development in undergraduate mathematics education. In Research in Collegiate Mathematics Education II. CBMS Issues in Mathematics Education (Vol. 6, pp. 1–32). Providence, RI: American Mathematical Society.
3. Asiala, M., Brown, A., Kleiman, J., & Mathews, D. (1998). The development of students’ understanding of permutations and symmetries. International Journal of Mathematical Learning, 3, 13–43.
4. Asiala, M., Cottrill, J., Dubinsky, E., & Schwingendorf, K. (1997). The development of students’ graphical understanding of the derivative. The Journal of Mathematical Behavior, 16, 399–431.
5. Asiala, M., Dubinsky, E., Mathews, D., Morics, S., & Oktaç, A. (1997). Development of students’ understanding of cosets, normality and quotient groups. The Journal of Mathematical Behavior, 16, 241–309.