@INBOOK { martinezfeature09encyclopediaBiometrics,
author = {Marcos Martinez-Diaz and Julian Fierrez and S. Hangai },
booktitle = {Encyclopedia of Biometrics (ISBN 978-0-387-73003-5)},
editor = {Stan Z. Li},
month = {July},
publisher = {Springer Verlag},
title = {Signature Features},
year = {2009},
}