1. From artifacts to instruments - A theoretical framework behind the orchestra metaphor;Drijvers,2007
2. Gabrielle, D. M. (2005). The effects of technology-mediated instructional strategies on motivation, performance, and self-directed learning.(Doctoral dissertation, Florida State University).
3. Teaching and Learning Calculus with Free Dynamic Mathematics Software GeoGebra.;Hohenwarter,2008
4. Hohenwarter, M., & Preiner, J. (2007). Dynamic Mathematics with GeoGebra. Journal of Online mathematics and Its Application, 7, March. ID 1448.
5. “Motivational Design of Instruction”, Instructional-Design Theories and Models;Keller,1983