Modified digital correlator and its estimation errors. - Ke-Yen Chang; A. Moore (IEEE Trans. Inf. Theory, 1970)

Analysis, Optimization, and Sensitivity Study of Differential PCM Systems Operating on Noisy Communication Channels. - Ke-Yen Chang; Robert W. Donaldson (IEEE Trans. Commun., 1972)

Nonadaptive DPCM Transmission of Monochrome Pictures Over Noisy Communication Channels. - Ke-Yen Chang; Robert W. Donaldson (IEEE Trans. Commun., 1976)