@inbook{Rouskas_2008,
title={Hierarchical Traffic Grooming},
ISBN={9780387745183},
ISSN={1935-3839},
url={http://dx.doi.org/10.1007/978-0-387-74518-3_6},
DOI={10.1007/978-0-387-74518-3_6},
booktitle={Traffic Grooming for Optical Networks},
publisher={Springer US},
author={Rouskas,
George N. and Dutta,
Rudra},
year={2008},
pages={73–88} }