1. A Nonpolarizing Electrode for Physiological Stimulation;Lewin;Tr. Am. Soc. Artif. Intern. Organs,1967
2. Lewin, G., Myers, G. H., Parsonnet, V., and Zucker, I. R.: Differential Current Density Electrodes for Pacemakers. Proceedings of the 19th Annual Conferences, Eng. Med. & Biol. 8: 165, 1966.