BOCHENEK W, CHORZEMPA A, HAZELL JW, KUKWA AJ, KICIAK J. An extra cochlear electro-stimulating device (ECME) using atraumatic external meatal electrodes as a communication aid for the deafened. Arch. Acoust. 1990;15(1-2):31-37. Accessed April 18, 2026. http://acoustics.ippt.gov.pl/index.php/aa/article/view/1255