Olusanya, BO; Neumann, KJ; Saunders, JE (1. maj 2014). »The global burden of disabling hearing impairment: a call to action«. Bulletin of the World Health Organization. 92 (5): 367–73. doi:10.2471/blt.13.128728. PMID24839326.
Olusanya, BO; Neumann, KJ; Saunders, JE (1. maj 2014). »The global burden of disabling hearing impairment: a call to action«. Bulletin of the World Health Organization. 92 (5): 367–73. doi:10.2471/blt.13.128728. PMID24839326.