@ARTICLE {9173,
author={A. Shahpari and A. Mahmoud  and RMF Ferreira and G. Parca and J.D. Reis and V. Carrozzo and M. J. N. Lima and G. Beleffi  and A. Teixeira},
doi={10.1080/01468030.2014.886751},
journal={Fiber and Integrated Optics},
title={Ultra High Capacity PON Systems with Free-Space Optical  Communications},
year={2014},
month={July},
volume={33},
number={3},
pages={149-162},
ISSN={0146-8030}
}