@INPROCEEDINGS {1559,
author={J.   Nascimento and J. Bioucas-Dias},
doi={10.1007/978-3-540-44871-6_73},
booktitle={Iberian Conf. on Pattern Recognition and Image Analysis},
title={Vertex Component Analysis: A fast algorithm to extract endmembers spectra from Hyperspectral data},
year={2003},
month={June},
volume={LNCS - 2652},
pages={626-635} 
}