?url_ver=Z39.88-2004&rft_id=10.1109%2FAVSS.2006.50&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=McCool%2C+Christopher&rft.aulast=McCool&rft.aufirst=Christopher&rft.title=Feature+Modelling+of+PCA+Difference+Vectors+for+2D+and+3D+Face+Recognition&rft.isbn=0-7695-2688-8&rft.date=2006&rft.genre=bookitem