Tomohiko Ohtsuka Daisuke Watanabe Hiroyuki Aoki Fingerprint Core and Delta Detection by Candidate Analysis. 130-133 2007 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/2007CD/papers/03-25.pdf conf/mva/2007 db/conf/mva/mva2007.html#OhtsukaWA07