@INPROCEEDINGS {3221,
author={L.   Cancela and J. J. O.  Pires},
doi={},
booktitle={Conf. on Lasers and Electro-optic - CLEO},
title={Impact of Intrachannel Crosstalk on the Performance of Direct-Detection DPSK Optical Systems},
year={2005},
month={May},
volume={*},
pages={*-*} 
}