G. Salton and H. -J. Schneider.International Conference on Research and Development in Information Retrieval (15th : 1982 : Berlin)：Research and development in information retrieval ; proceedings.Springer-Verlag,1983.
International Conference on Research and Development in Information Retrieval (15th : 1982 : Berlin)：Research and development in information retrieval ; proceedings
G. Salton and H. -J. Schneider.Springer-Verlag,1983.
