Roberto Navigli Mirella Lapata Graph Connectivity Measures for Unsupervised Word Sense Disambiguation. 1683-1688 2007 conf/ijcai/2007 IJCAI http://dli.iiit.ac.in/ijcai/IJCAI-2007/PDF/IJCAI07-272.pdf db/conf/ijcai/ijcai2007.html#NavigliL07