Short Queries, Natural Language and Spoken Document Retrieval: Experiments at Glasgow University. - Fabio Crestani; Mark Sanderson; Marcos Theophylactou; Mounia Lalmas (TREC, 1997)

A Dempster-Shafer Model for Document Retrieval using Noun Phrases. - Marcos Theophylactou; Mounia Lalmas (BCS-IRSG Annual Colloquium on IR Research, 1998)