Path Expressions for Complex Queries and Automatic Database Program Conversion. - Ben Shneiderman; Glenn Thomas (VLDB, 1980)

Automatic database system conversion: schema revision, data translation, and source-to-source program transformation. - Ben Shneiderman; Glenn Thomas (AFIPS National Computer Conference, 1982)

An Architecture for Automatic Relational Database System Conversion. - Ben Shneiderman; Glenn Thomas (ACM Trans. Database Syst., 1982)