New directions in office automation research: SIGOA panel. - Stanley B. Zdonik; Robert Epstein; William C. Sasso; Sigfried Treu (ACM Conference on Computer Science, 1988)

Design process and decision rationale models for the N-Chime interface system. - Sigfried Treu; D. Peter Sanderson; Roman Rozin; Ravi Sharma (ACM SIGCHI Bull., 1990)