1. Ambrus, A. (2004). Bevezetés a matematikadidaktikába (Introduction to Mathematical Didactics). Budapest, Hungary: ELTE Eötvös Kiadó.
2. Baddeley, A., Eysenk, M. V., & Anderson, M. C. (2009). Memory. New York: Psychology Press.
3. Barczi, K. (2013). Applying cooperative techniques in teaching problem solving. CEPS Journal, 3(4), 61–78.
4. Burns, M. (1990). Using groups of four. In N. Davidson (Ed.), Cooperative-learning in mathematics (pp. 21–46). Boston, MA: Addison-Wesley.
5. Chandler, P., & Sweller, J. (1991). Cognitive load theory and the format of instruction. Cognition and Instruction, 8(4), 293–332.