The Digital Phase-Locked Loop as a Near-Optimum FM Demodulator. - Carl N. Kelly; Someshwar C. Gupta (IEEE Trans. Commun., 1972)

Discrete-time demodulation of continuous-time signals (Ph.D. Thesis abstr.). - Carl N. Kelly (IEEE Trans. Inf. Theory, 1972)

Discrete-time demodulation of continuous-time signals. - Carl N. Kelly; Someshwar C. Gupta (IEEE Trans. Inf. Theory, 1972)