1. A profile of older Americans. Washington, DC, American Association of Retired Persons (AARP), 1985.
2. Banzer M: De auditione laesa. Wittenberg, 1640 (Cited in reference 3)
3. The Hearing Aid: Its Operation and Development;Berger,1984
4. Electrical stimulation of the eighth cranial nerve;Doyle;Arch Otolaryngol Head Neck Surg,1964
5. De l'excitation du nerf cochlear chez l'homme par induction a distance a l'aide microbabinage a demure;Djourno;CR Soc Biol,1957