John H. Hipwell Christine Tanner William R. Crum David J. Hawkes X-Ray Mammogram Registration: A Novel Validation Method. 197-204 2006 conf/mammo/2006 Digital Mammography / IWDM http://dx.doi.org/10.1007/11783237_28 db/conf/mammo/iwdm2006.html#HipwellTCH06