Rada Mihalcea Courtney Corley Carlo Strapparava Corpus-based and Knowledge-based Measures of Text Semantic Similarity. 2006 conf/aaai/2006 AAAI db/conf/aaai/aaai2006.html#MihalceaCS06 http://www.aaai.org/Library/AAAI/2006/aaai06-123.php 775-780