Towards Understanding Text with a Very Large Vocabulary. - Damaris M. Ayuso; Robert J. Bobrow; Dawn MacLaughlin; Marie Meteer; Lance A. Ramshaw; Richard M. Schwartz; Ralph M. Weischedel (HLT, 1990)

BBN: description of the PLUM system as used for MUC-5. - Ralph M. Weischedel; Damaris M. Ayuso; Sean Boisen; Heidi Fox; Robert Ingria; Tomoyoshi Matsukawa; Constantine Papageorgiou; Dawn MacLaughlin; Masaichiro Kitagawa; Tsutomu Sakai; June Abe; Hiroto Hosihi; et al. (MUC, 1993)