1) Declau F, Cremers C and Van de Heyning P: Diagnosis and management strategies in congenital atresia of the external auditory canal. Br J Audiol 33: 313-327, 1999.
2) Hakansson B, Tjellstrom A, Rosenhall U, et al.: The boneanchored hearing aid: principles design and a psychoacoustical evaluation. Acta Otolaryngol 100: 229-239, 1985.
3) Hakansson B, Liden G, Tjellstrom A, et al.: Ten years of experience with the Swedish bone-anchored hearing system. Ann Otol Rhinol Laryngol 99: 1-16, 1990.
4) Cremers CW, Snik FM and Beynon AJ: Hearing with the bone-anchored hearing aid (BAHA, HC200) compared to a conventional bone-conduction hearing aid. Clin Otolaryngol Alied Sci 17: 275-279, 1992.
5) Bonilla JA and Yellon RF: Surgical management of microtia and congenital aural atresia. Pediatric Otolaryngology 4th edition (ed by Bluestone CD, Stool SE, Alper CM et al.) pp 421-440, Saunders, Philadelphia, 2003.