A WebCite®-enhanced reference is a reference which contains - in addition to the original live URL (which can and probably will disappear in the future, or its content may change) - a link to an archived copy of the material, exactly as the citing author saw it when he accessed the cited material.
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R. Torres, S. McNee, M. Abel, J. Konstan, and J. Riedl. Proceedings of the 4th ACM/IEEE-CS Joint Conference on Digital Libraries, page 228--236. New York, NY, USA, ACM, (2004)
S. Aya, C. Lagoze, and T. Joachims. Proceedings of the International Conference on Knowledge Management, page 287--298. World Scientific Publishing, (October 2005)
S. Aya, C. Lagoze, and T. Joachims. Proceedings of the International Conference on Knowledge Management, page 287--298. World Scientific Publishing, (October 2005)
U. Sandström, D. Wadskog, and S. Karlsson. ISSI 2005 : Proceedings of the 10th International Conference of the International Society for Scientometrics and Informetrics, Vols 1 and 2, page 690--691. (2005)QC 20120202.
N. Aswani, K. Bontcheva, and H. Cunningham. Proceedings of the 5th International Conference on The Semantic Web, page 329--342. Berlin/Heidelberg, Springer, (2006)
T. Tilley, and P. Eklund. 18th International Workshop on Database and Expert Systems Applications (DEXA), page 545--550. IEEE Computer Society, (September 2007)
C. Castillo, D. Donato, and A. Gionis. Proceedings of String Processing and Information Retrieval (SPIRE), volume 4726 of LNCS, page 107--117. Santiago, Chile, Springer, (October 2007)
T. Strohman, W. Croft, and D. Jensen. Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval, page 705--706. New York, NY, USA, ACM, (2007)