Cochlear implants for adults obtaining marginal benefit from acoustic amplification: A European study. - Fraysse,B.; Dillier,N.; Klenzner,T.; Laszig,R.; Manrique,M.; Morera Perez,P.C.; Morgon,A.H.; Muller-Deile,J.; Ramos Macias,M.A. (Am J Otol, 1998)