A. Berglund, I. Box, A. Eckerdal, R. Lister, and A. Pears. Proceedings of the Tenth Conference on Australasian Computing Education - Volume 78, page 35--42. Darlinghurst, Australia, Australia, Australian Computer Society, Inc., (2008)
V. Isomöttönen, V. Tirronen, and M. Cochez. Proceedings of the 18th ACM conference on Innovation and technology in computer science education, page 111--116. New York, NY, ACM, (2013)