MultiFunction Threshold Gates. - Daniel Hampel (IEEE Trans. Computers, 1973)

Design and application of electronically programmable LSI arrays. - Daniel Hampel; Roger L. Barron; Dixon Cleveland (AFIPS National Computer Conference, 1975)

Application of Monolithic CMOS Switched-Capacitor Filters and Amplifiers for Signal Processing. - Daniel Hampel; John L. Bradshaw (IEEE Trans. Commun., 1980)