@INPROCEEDINGS {15054,
author={P. F. Rosário and T. M. F. Alves  and A. Cartaxo},
doi={0},
booktitle={IEEE Photonics Conf. - IPC},
title={ROADM cascade performance in DD multi-band OFDM metro networks employing virtual carriers},
year={2014},
month={October},
volume={1},
pages={1-2} 
}