A Direct Manipulation Interface for Boolean Information Retrieval via Natural Language Query. - Peter G. Anick; Jeffrey D. Brennan; Rex A. Flynn; David R. Hanssen; Bryan Alvey; Jeffrey M. Robbins (SIGIR, 1990)

Addressing the Requirements of a Dynamic Corporate Textual Information Base. - Peter G. Anick; Rex A. Flynn; David R. Hanssen (SIGIR, 1991)