Nicholas J. Belkin Colleen Cool Diane Kelly Shin-jeng Lin Soyeon Park Jose Perez Carballo C. Sikora Iterative exploration, design and evaluation of support for query reformulation in interactive information retrieval. 403-434 2001 37 Inf. Process. Manage. 3 db/journals/ipm/ipm37.html#BelkinCKLPCS01