@ARTICLE {3429,
author={F. Pereira and A. Vetro and  Sikora},
doi={10.1109/JPROC.2008.916384},
journal={Proceedings of the IEEE},
title={Multimedia retrieval and delivery: essential metadata challenges and standards},
year={2008},
month={April},
volume={96},
number={4},
pages={721-744},
ISSN={0018-9219}
}