The control structure facilities of ECL. - Charles J. Prenner (International Symposium on Extensible Languages, 1971)

An implementation of backtracking for programming languages. - Charles J. Prenner; Jay M. Spitzen; Ben Wegbreit (ACM SIGPLAN Notices, 1972)

Extensible control structures. - Charles J. Prenner (SIGPLAN-SIGOPS Interface Meeting, 1973)

Instructional computer systems for higher education. - Charles J. Prenner; Alfred Z. Spector (AFIPS National Computer Conference, 1976)

Verifying Formal Specifications of Synchronous Processes. - Patricia P. Griffiths; Charles J. Prenner (POPL, 1976)

Programming languages for relational database systems. - Charles J. Prenner; Lawrence A. Rowe (AFIPS National Computer Conference, 1978)

Toward a unified view of data base management, programming languages, and operating systems-a tutorial. - Anthony I. Wasserman; Charles J. Prenner (Inf. Syst., 1979)