PICASSO - An Aid to an End-User Facility. - Paul G. Sorenson; Joseph A. Wald (SIGMOD Conference, 1977)

Steiner trees, partial 2-trees, and minimum IFI networks. - Joseph A. Wald; Charles J. Colbourn (Networks, 1983)

Resolving the Query Inference Problem Using Steiner Trees. - Joseph A. Wald; Paul G. Sorenson (ACM Trans. Database Syst., 1984)

VATS - the visible attributed translation system. - A. Berg; D. A. Bocking; Darwyn R. Peachey; Paul G. Sorenson; J. Paul Tremblay; Joseph A. Wald (SIGSMALL, 1985)

Implementing Constraints in a Knowledge Base. - Joseph A. Wald (Expert Database Conf., 1988)

Explaining Ambiguity in a Formal Query Language. - Joseph A. Wald; Paul G. Sorenson (ACM Trans. Database Syst., 1990)