Isaac G. Councill C. Lee Giles Hui Han Eren Manavoglu Automatic acknowledgement indexing: expanding the semantics of contribution in the CiteSeer digital library. 19-26 2005 conf/kcap/2005 K-CAP http://doi.acm.org/10.1145/1088622.1088627 db/conf/kcap/kcap2005.html#CouncillGHM05