Hello Central: an Object-Oriented Data Browser. - Hans Brunner; Steve Fogel; Rob Cuthbertson; Randall Sparks (ACM SIGCHI Bull., 1991)

Data Model and Query Algebra for a Model-Based, Multi-Modal User Interface. - Jacques Durand; Hans Brunner; Rob Cuthbertson; Steve Fogel; Tim McCandless; Randall Sparks; Loren Sylvan (IDS, 1992)