author- CHI, page 518-525. ACM/Addison-Wesley, (1997)
- CHI, page 203-210. ACM, (1998)
- CoRR (1999)
- Proceedings of the 28th of the international conference extended abstracts on Human factors in computing systems, page 4297--4302. New York, NY, USA, ACM, (2010)
- Inf. Process. Manage. 34(5):535-555 (1998)
- ECIR, volume 2997 of Lecture Notes in Computer Science, page 1-11. Springer, (2004)
- SIGIR Forum 45(1):70-72 (2011)
- CIVR, volume 2728 of Lecture Notes in Computer Science, page 271-280. Springer, (2003)
- ECDL, volume 2458 of Lecture Notes in Computer Science, page 493-507. Springer, (2002)
- ICADL, volume 2555 of Lecture Notes in Computer Science, page 528. Springer, (2002)
- International Journal of Man-Machine Studies 30(6):591-618 (1989)
- Commun. ACM 38(4):67-75 (1995)
- Cambridge University Press, New York, USA, (1995)
- (2004)
- Synthesis Lectures on Information Concepts, Retrieval, and Services Morgan & Claypool Publishers, (2010)
- Communications of the ACM 49(4):41--46 (April 2006)
- J. Digit. Inf. (2003)
- Communications of the ACM 49(4):41--46 (April 2006)
- Cambridge University Press, New York, USA, (1995)
- (2004)
