1. Wouters J, Geurts L, Laneau J, Luts H, et al. (2002). Digital hearing aids and future directions for hearing aids. Acta Oto-Rhino-Laryngologica Belgica 56(4):357-361.
2. van den Broek P, Admiraal R. (1991). Selection of patients for a cochlear implant. Acta Oto-Rhino-Laryngologica Belgica 45(2):243-6.
3. Fraysse B, Vincent M, Corvera G, Esteve-Fraysse MJ, et al. (1991). [Electrophysiological tests in the evaluation of selection for cochlear implants]. Acta Oto-Rhino-Laryngologica Belgica 45(2):247-51.
4. Kaga K, Suzuki J. (1991). Bilateral congenital atresia. Auditory and vestibular testing and surgical approach. Acta Oto-Rhino-Laryngologica Belgica 45(1):51-7.
5. Gersdorff M. (1991). Results of cochlear implants in children. Acta Oto-Rhino-Laryngologica Belgica 45(3):293-5.