@ARTICLE {9316,
author={P.S André and A. Shahpari and A. Teixeira and R.N.  Nogueira and A. Sousa},
doi={10.1002/mop.28534},
journal={Microwave and Optical Tech. Letters},
title={GROUP VELOCITY DISPERSION MONITORING FOR QPSK SIGNALS USING DIRECT DETECTION },
year={2014},
month={September},
volume={56},
number={9},
pages={2078-2080},
ISSN={0895-2477}
}