Das Neves, Fernando A.2013-06-192013-06-192001-12-01http://hdl.handle.net/10919/20015A Tri-Valued Belief Network Model for Information Retrieval.application/pdfenIn CopyrightInformation retrievalA Tri-Valued Belief Network Model for Information RetrievalTechnical reportTR-01-25http://eprints.cs.vt.edu/archive/00000549/01/FDN01.pdf