@ARTICLE {6433,
author={J.  Rebola and A. Cartaxo},
doi={10.1364/JOCN.4.000229},
journal={Journal of Optical Communications and Networking},
title={Bit Error Probability Evaluation in Optically Preamplified Direct-Detection OFDM Systems Using the Moment Generating Function},
year={2012},
month={March},
volume={4},
number={3},
pages={229-237},
ISSN={1943-0620}
}