@ARTICLE {5871,
author={H. Proença and D. Yang},
doi={10.1007/s11760-011-0243-7},
journal={Eurasip Journal on Image and Video Processing},
title={Introduction to the Special Issue On Unconstrained Biometrics: Advances and Trends},
year={2011},
month={September},
volume={5},
number={3},
pages={1-2},
ISSN={1687-5281}
}