Microcomputer control of permanently implanted blood pumps. - Alan J. Snyder; William J. Weiss; William S. Pierce; Richard A. Nazarian (CBMS, 1989)

Permanent circulatory support systems at the Pennsylvania State University. - William J. Weiss; Gerson Rosenberg; Alan J. Snyder; Thomas J. Cleary; Roger P. Gaumond; David B. Geselowitz; William S. Pierce (IEEE Trans. Biomed. Eng., 1990)