Selected references
- John S. Bailey and George Epstein. Single function shifting counters. Journal of the ACM, 9(3):375-378, July 1962.
- G. B. Fitzpatrick. Synthesis of binary ring counters of given periods. Journal of the ACM, 7(3):287-297, July 1960.
- Frederick H. Young. Analysis of shift register counters. Journal of the ACM, 5(4):385-388, October 1958.