?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Clarke%2C+Paul&rft.aulast=Clarke&rft.aufirst=Paul&rft.date=5+November+2014&rft.title=The+demands+of+safety-critical+medical+device+software+development&rft.genre=proceeding