A. Luxton-Reilly. Proceedings of the 2016 ACM Conference on Innovation and Technology in Computer Science Education, Seite 284--289. New York, NY, USA, ACM, (2016)
M. Kölling, B. Koch, und J. Rosenberg. Proceedings of the Twenty-sixth SIGCSE Technical Symposium on Computer Science Education, Seite 173--177. New York, NY, USA, ACM, (1995)