@ARTICLE {6928,
author={J. Ferreira and R.N.  Nogueira and P. Monteiro and A. N. Pinto},
doi={10.1364/JOCN.4.000595},
journal={Journal of Optical Communications and Networking},
title={Weighted Undepleted Pump Model for Broadband Counter-Pumped Raman Fiber Amplifiers},
year={2012},
month={August},
volume={4},
number={8},
pages={ 595-602},
ISSN={1943-0620}
}