Ralph M. Weischedel Edward Walker Damaris M. Ayuso Jos de Bruin Kimberle Koile Lance A. Ramshaw Varda Shaked Out of the Laboratory: A Case Study with the IRUS Natural Language Interface. 1986 HLT http://acl.ldc.upenn.edu/H/H86/H86-1007.pdf conf/hlt/1986 db/conf/hlt/hlt1986.html#WeischedelWABKRS86