IRENA: Information Retrieval Engine based on Natural Language Analysis. - Avi Arampatzis; T. Tsoris; Cornelis H. A. Koster (RIAO, 1997)

Phase-Based Information Retrieval. - Avi Arampatzis; T. Tsoris; Cornelis H. A. Koster; Theo P. van der Weide (Inf. Process. Manag., 1998)