1. Britton, S., & Henderson, J. (2009). Linear algebra revisited: An attempt to understand students’ conceptual difficulties. International Journal of Mathematics Education in Science and Technology, 40, 963–974.
2. Carlson, D., Johnson, C., Lay, D., & Porter, D. (1993). The linear algebra curriculum study group recommendation for the first course in linear algebra. The College Mathematics Journal, 24(1), 41–46.
3. Denzin, N. K., & Lincoln, Y. S. (2011). Introduction: The discipline and practice of qualitative research. In N. K. Denzin & Y. S. Lincoln (Eds.), The SAGE handbook of qualitative research (pp. 1–20). Thousand Oaks, CA: SAGE Publications.
4. Dogan-Dunlap, H. (2010). Linear algebra students’ modes of reasoning: Geometric representations. Linear Algebra and its Applications, 432(8), 2141–2159.
5. Dorier, J. –. L., & Sierpinska, A. (2001). Research into the teaching and learning of linear algebra. In D. Holton (Ed.), The teaching and learning of mathematics at university level: An ICMI study (pp. 255–273). Kluwer Academic Publishers.