Howard R. Turtle. Natural Language vs. Boolean Query Evaluation: A Comparison of Retrieval Performance. In W. Bruce Croft, C. J. van Rijsbergen, editors, Proceedings of the 17th Annual International ACM-SIGIR Conference on Research and Development in Information Retrieval. Dublin, Ireland, 3-6 July 1994 (Special Issue of the SIGIR Forum). pages 212-220, ACM/Springer, 1994. [doi]
Abstract is missing.