Philip Michael, Neil Opie, Michael Smith: Noise exposure and convertible cars. In: Otolaryngology--Head and Neck Surgery: Official Journal of American Academy of Otolaryngology-Head and Neck Surgery. Band143, Nr.2, August 2010, ISSN1097-6817, S.219–222, doi:10.1016/j.otohns.2010.03.009, PMID 20647123.
Philip Michael, Neil Opie, Michael Smith: Noise exposure and convertible cars. In: Otolaryngology--Head and Neck Surgery: Official Journal of American Academy of Otolaryngology-Head and Neck Surgery. Band143, Nr.2, August 2010, ISSN1097-6817, S.219–222, doi:10.1016/j.otohns.2010.03.009, PMID 20647123.
Philip Michael, Neil Opie, Michael Smith: Noise exposure and convertible cars. In: Otolaryngology--Head and Neck Surgery: Official Journal of American Academy of Otolaryngology-Head and Neck Surgery. Band143, Nr.2, August 2010, ISSN1097-6817, S.219–222, doi:10.1016/j.otohns.2010.03.009, PMID 20647123.