@INPROCEEDINGS {3223,
author={L.   Cancela and J. J. O.  Pires},
doi={},
booktitle={European Conf. on Optical Communications - ECOC},
title={Numerical Study on the Tolerance to Intrachannel Crosstalk of Direct-Detection DPSK Optical Systems},
year={2005},
month={September},
volume={*},
pages={*-*} 
}
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