Miguel Adán Antonio Adán Roberto Torres Andrés S. Vázquez Gloria Bueno García Personal Authentication Based on Hands Natural Layout. 160-163 2005 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/2005/papers/2005160.pdf conf/mva/2005 db/conf/mva/mva2005.html#AdanATVB05