Selected references
- Seymour Ginsburg and H. Gordon Rice. Two families of languages related to ALGOL. Journal of the ACM, 9(3):350-371, July 1962.
- Seymour Ginsburg and Gene F. Rose. Some recursively unsolvable problems in ALGOL-like languages. Journal of the ACM, 10(1):29-47, January 1963.
- Seymour Ginsburg and G. F. Rose. Operations which preserve definability in languages. Journal of the ACM, 10(2):175-195, April 1963.