1. An experiment in automatic thesaurus construction;Dattola,1967
2. User-oriented Document clustering: A framework for learning in information retrieval;Deogun;ACM Conference on Research and Development in Information Retrieval,1986
3. Semantic clustering of index terms;Gottlieb;JACM,1968
4. One method of automatic construction of query formulation;Frants;Nauchno-Technicheskaya Informatsiya (NTI),1970
5. The need for information and some aspects of information retrieval systems construction;Frants;JASIS,1988