1. 2000 years of electrical stimulation;McNeal,1977
2. “Manual of Patent Examining Procedure,” 5th Ed., 608.01 (p). 1983. U.S. Department of Commerce, Patent and Trademark Office.
3. Electronics and electrodes for sensory prostheses;White,1977
4. Cardiac pacing—from then to now;Gold;Med. Instrum.,1984
5. “Polyurethanes in Medicine.”;Lelah,1986