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Knopf A, Schneider J, Schipper J, Hoffmann TK, Bas M.Knopf A, et al.HNO. 2008 Aug;56(8):808-12. doi: 10.1007/s00106-007-1614-9.HNO. 2008.PMID: 17876561German.
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Knopf A, Mansour N, Chaker A, Bas M, Stock K.Knopf A, et al.Eur J Radiol. 2012 Nov;81(11):3300-5. doi: 10.1016/j.ejrad.2012.01.004. Epub 2012 Jan 24.Eur J Radiol. 2012.PMID: 22269165
Brandstetter M, Matsuba Y, Knopf A.Brandstetter M, et al. Among authors: knopf a.HNO. 2012 May;60(5):443-5. doi: 10.1007/s00106-011-2398-5.HNO. 2012.PMID: 22358776German.
Mansour N, Stock KF, Chaker A, Bas M, Knopf A.Mansour N, et al. Among authors: knopf a.Ultraschall Med. 2012 Jun;33(3):283-8. doi: 10.1055/s-0031-1299130. Epub 2012 Apr 13.Ultraschall Med. 2012.PMID: 22504938
Knopf A, Lahmer T, Chaker A, Stark T, Hofauer B, Pickhard A, Thürmel K, Bas M.Knopf A, et al.Head Neck. 2013 May;35(5):715-9. doi: 10.1002/hed.23022. Epub 2012 Jun 22.Head Neck. 2013.PMID: 22730039
Hofauer B, Bas M, Manour N, Knopf A.Hofauer B, et al. Among authors: knopf a.HNO. 2013 Nov;61(11):921-7. doi: 10.1007/s00106-013-2736-x.HNO. 2013.PMID: 23868654Clinical Trial.German.