W. Bruce Croft, Howard R. Turtle, David D. Lewis. The Use of Phrases and Structured Queries in Information Retrieval. In Abraham Bookstein, Yves Chiaramella, Gerard Salton, Vijay V. Raghavan, editors, Proceedings of the 14th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval. Chicago, Illinois, USA, October 13-16, 1991 (Special Issue of the SIGIR Forum). pages 32-45, ACM, 1991. [doi]
Abstract is missing.