user- http://www.cnotinfor.pt
- Communications of the ACM 52(11):60-67 (2009)
- CHI '96: Conference companion on Human factors in computing systems, page 11-12. New York, NY, ACM Press, (1996)
- CHI '95: Proceedings of the SIGCHI conference on Human factors in computing systems, page 27-34. New York, NY, ACM Press/Addison-Wesley Publishing Co., (1995)
- Cognition and Instruction 24(2):171-209 (2004)
- (2003)
- Journal of Computing Sciences in Colleges 15(5):107-116 (2000)
- Computer 28(3):17-25 (1995)
- Communications of the ACM 43(3):75-81 (2000)
- CHI '00: Proceedings of the SIGCHI conference on Human factors in computing systems, page 486-493. New York, NY, USA, ACM Press, (2000)
- ACM Comput. Surv. 37(2):83-137 (2005)
- Computer Science Education Research, Taylor & Francis Group, plc, London, UK, (2004)
- Interactive Learning Environments 12(1):109-159 (2004)
