1. Lee, S.C.: Digital circuits and logic design, 5th ed. Prentice-Hall of India (1987)
2. Winogards, S.: On the time required to perform addition. J. ACM 12(2), 793–802 (1967)
3. Floress, I.: The logic of computer arithmetic. Prentice-Hall, Englewood, Cliffs, NJ (1963)
4. Winogards, S.: On the time required to perform addition. J. ACM 12(2), 277–285 (1965)
5. Lee, S.C.: Digital electronics. Prentice-Hall of India (1976)