David Milner Hagit Hel-Or Daniel Keren Shmuel Raz Eviatar Nevo Analyzing symmetry in biological systems. 361-364 2005 ICIP (1) http://dx.doi.org/10.1109/ICIP.2005.1529762 db/conf/icip/icip2005-1.html#MilnerHKRN05