Selected references
- Edward H. Friend. Sorting on electronic computer systems. Journal of the ACM, 3(3):134-168, July 1956.
- Lionello Lombardi. System handling of functional operators. Journal of the ACM, 8(2):168-185, April 1961.
- Rosalind B. Marimont. A new method of checking the consistency of precedence matrices. Journal of the ACM, 6(2):164-171, April 1959.