International Sociology, Vol. 21, No. 1. (1 January 2006), pp. 83-99.
(2004)
(18 Aug 2005)
(20 February 2004)
J. Inf. Sci., Vol. 32, No. 2. (April 2006), pp. 198-208.
(4 May 2006)
(2007), pp. 29-42.
(2007), pp. 351-360.
eLearn, Vol. 2005, No. 10. (October 2005)
(7 May 2007)
PWASET, Vol. 24, No. 1307-6884. (October 2007)
(7 Aug 2007)
(6 Sep 2006)
(April 2003), pp. 24-26.
Computers & Education, Vol. In Press, Corrected Proof
(20 December 2002)
Vol. 1193 (1996)
Computer Supported Cooperative Work, 2006, CSCW '06. 20th anniversary Conference on (2006), pp. 181-190.
Proceedings of the National Academy of Sciences, Vol. 104, No. 39. (25 September 2007), pp. 15224-15229.
(2005), pp. 157-158.
(20 April 2007)
Autonomous Agents and Multi-Agent Systems, Vol. 3, No. 3. (2000), pp. 285-312.
(2003)
(2003)
Vol. 10, No. 2. (1994), pp. 115-152.
(1989), pp. 25-40.
(31 July 2000)
(12 June 2002)
Journal of Object Technology, Vol. 1 (2002), pp. 41-53.
(2001), pp. 100-101.
(2000)
(2000)
Software Engineering, 2003. Proceedings. 25th International Conference on (2003), pp. 726-736.
Annals of Operations Research, Vol. 75, No. 1. (1997), pp. 69-101.
(2007), pp. 91-100.
(12 Apr 2007)
Artificial Intelligence, Vol. 117, No. 2. (March 2000), pp. 277-296.
Science, Vol. 310, No. 5750. (11 November 2005), pp. 987-991.
Journal of Artificial Intelligence Research, Vol. 2 (1995), pp. 475-500.
(2000), pp. 105-120.