@ARTICLE {28224,
author={A. Eira and J. M. Pedro and J. J. O.  Pires},
doi={10.1109/JLT.2018.2874058},
journal={Journal of Lightwave Technology},
title={Modeling Cost Versus Flexibility in Optical Transport Networks},
year={2019},
month={January},
volume={37},
number={1},
pages={61-74},
ISSN={0733-8724}
}