M. J. Burton, C. Doree: Ear drops for the removal of ear wax. In: The Cochrane database of systematic reviews. Nummer 1, 2009, S. CD004326, doi:10.1002/14651858.CD004326.pub2. PMID 19160236.
M. J. Burton, C. Doree: Ear drops for the removal of ear wax. In: The Cochrane database of systematic reviews. Nummer 1, 2009, S. CD004326, doi:10.1002/14651858.CD004326.pub2. PMID 19160236.