- ICLS 3, page 330-331. International Society of the Learning Sciences, (2008)
- CSCL, page 548-549. International Society of the Learning Sciences, (2002)
- CSCL, page 826. International Society of the Learning Sciences / ACM DL, (2007)
- CSCL, page 596-598. International Society of the Learning Sciences / ACM DL, (2007)
- MIE, volume 150 of Studies in Health Technology and Informatics, page 302-306. IOS Press, (2009)
- (2007)
- Int. Sym. Wikis, page 37-46. ACM, (2006)
- Mobile HCI, page 266. ACM, (2006)
- J. Comp. Assisted Learning 19(3):320-329 (2003)
- WMTE, page 140-146. IEEE Computer Society, (2002)
- OOIS, page 195-. (1996)
- OOIS, page 261-271. (1997)
- OOIS, page 141-154. Springer, (2000)


author