Formal Methods at AT&T - An Industrial Usage Report. - John A. Chaves (FORTE, 1991)

A Framework for Evaluating Specification Methods for Reactive Systems Experience Report. - Mark A. Ardis; John A. Chaves; Lalita Jategaonkar Jagadeesan; Peter Mataga; Carlos Puchol; Mark G. Staskauskas; James Von Olnhausen (IEEE Trans. Software Eng., 1996)