H Akhlaghi, L Corben, E Storey, J Bradshaw, A Churchyard, N Georgiou-Karistianis, M Delatycki and G Egan
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WNP-4X3PHYG-13&_user=10&_coverDate=07%2F31%2F2009&_alid=1016977109&_rdoc=1&_fmt=high&_orig=search&_cdi=6968&_sort=r&_docanchor=&view=c&_ct=23&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=b42469b7f822812d2217b37f2f5f0bc5