1. Rutten, N., van Joolingen, W.R., van der Veen, J.T.: The learning effects of computer simulations in science education. Comput. Educ. 58, 136–153 (2012)
2. D’Angelo, C., Rutstein, D., Harrison, S., Bernard, R., Borokhovski, E., Haertel, G.: Simulations for STEM Learning: Systematic Review and Meta-Analysis. Technical report, SRI International (2014)
3. PhET Interactive Simulations.
http://phet.colorado.edu/
4. Balloons and Static Electricity – PhET Prototype Simulation.
http://www.colorado.edu/physics/phet/dev/html/balloons-and-static-electricity/1.2.0-accessible-instance.11/balloons-and-static-electricity_en.html?accessibility
5. PhET Interactive Simulations: Accessibility.
http://phet.colorado.edu/en/about/accessibility