Rayid Ghani Divna Djordjevic Chad M. Cumby Machine Learning and Lightweight Semantics to Improve Enterprise Search and Knowledge Management. 171-188 2011 Context and Semantics for Knowledge Management http://dx.doi.org/10.1007/978-3-642-19510-5_9 books/daglib/0027800 db/books/daglib/0027800.html#GhaniDC11