@INPROCEEDINGS {2545,
author={D. Polónia and J. L. Oliveira and A. M. O. D. Duarte},
doi={},
booktitle={Conf. da Associação Portuguesa de Sistemas de Informação},
title={INFORMATION SYSTEMS IN THE THIRD AND FOURTH GENERATION MOBILE OPERATOR},
year={2004},
month={November},
volume={5},
pages={1-13} 
}
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