author- CSCL, page 56. International Society of the Learning Sciences, (1999)
- CSCL, page 698-699. International Society of the Learning Sciences, (2002)
- CSCL, page 460-469. International Society of the Learning Sciences, (2005)
- CSCL, page 262-271. International Society of the Learning Sciences, (2005)
- CSCL, page 776-784. International Society of the Learning Sciences / ACM DL, (2007)
- IEEE Trans. on CAD of Integrated Circuits and Systems 25(10):2118-2128 (2006)
- IEEE Trans. on CAD of Integrated Circuits and Systems 25(10):2129-2139 (2006)
- Informatica Didactica (2000)
- Inf. Process. Lett. 4(4):90-94 (1976)
- CoopIS/DOA/ODBASE, volume 2519 of Lecture Notes in Computer Science, page 266-285. Springer, (2002)
- CoBuild, volume 1370 of Lecture Notes in Computer Science, page 107-113. Springer, (1998)
- DeLFI, page 115-126. (2004)
- DeLFI, volume 66 of LNI, page 57-68. GI, (2005)
- DeLFI, volume 52 of LNI, page 175-186. GI, (2004)
- DeLFI, volume 87 of LNI, page 291-302. GI, (2006)
- DeLFI, volume 111 of LNI, page 269-280. GI, (2007)
- GI Jahrestagung, volume 19 of LNI, page 249-250. GI, (2002)
- GI Jahrestagung, volume 19 of LNI, page 221-224. GI, (2002)
- Oldenbourg, München, Germany, 1 edition, (2004)
- i-com 4(2):37-44 (2005)
