@INPROCEEDINGS {15701,
author={A. F. Sousa and C. B. Lopes and P. Monteiro},
doi={10.1109/NETWKS.2014.6959208},
booktitle={International Telecommunications Network Strategy and Planning Symposium - networks},
title={Design Cost and Spectrum Efficiency Comparison of Fixed-Grid and Flex-Grid Optical Networks with Grooming},
year={2014},
month={September},
volume={1},
pages={1-4} 
}