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Griffiths RF, Powell DM.Griffiths RF, et al. Among authors: powell dm.Aviat Space Environ Med. 2012 May;83(5):514-21. doi: 10.3357/asem.3186.2012.Aviat Space Environ Med. 2012.PMID: 22606869Review.
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Powell DM, Spencer MB, Holland D, Broadbent E, Petrie KJ.Powell DM, et al.Aviat Space Environ Med. 2007 Jul;78(7):698-701.Aviat Space Environ Med. 2007.PMID: 17679568