1. Bergtrom, G. (2006). Clicker sets learning objects. Interdisciplinary Journal of E-Learning and Learning Objects., 2(1), 105–110.
2. Blasco-Arcas, L., Buil, I., Hernandez-Ortega, B., & Sese, F. J. (2013). Using clickers in class. The role of interactivity, active collaborative learning and engagement in learning performance. Computers & Education, 62, 102–110.
3. Bransford, J. D., Ann, L. B., & Rodney, R. C. (1999). How people learn: Brain, mind, experience and school. Washington D. C: National Academy Press.
4. Cai, J., & Brook, M. (2006). Looking back in problem solving. Mathematics Teaching, 196, 42–45.
5. Caldwell, J. (2007). Clickers in the large classroom: current research and best practice tips. CBE- Life Sciences Education, 6(1), 9–20.