1. and . A survey of digital phase-locked loops, I. E. E. E. Trans. Proc., 69 (Apr. 1981).
2. Analysis and Synthesis of a Digital Phase-Locked Loop for FM Demodulation
3. Steady state and transient analysis of a digital bit synchronization phase-locked loop, Int. Conf. Rec. I. E. E. E. Int. Conf. Commun. (June 1970).
4. A digital phase-locked loop for synchronizing digital networks, presented at the Int. Conf. Commun. San Francisco, Calif. (June 8–10, 1970).