db/conf/dl/GilesBL98.html C. Lee Giles Kurt D. Bollacker Steve Lawrence CiteSeer: An Automatic Citation Indexing System. 89-98 DL1998/P089.pdf 1998 conf/dl/98 ACM DL db/conf/dl/dl98.html#GilesBL98 http://doi.acm.org/10.1145/276675.276685