@article {22491,
	title = {Impairment-Constraint-Based Routing in Ultralong-Haul Optical Networks With 2R Regeneration},
	journal = {IEEE Photonics Technology LettersIEEE Photonics Technology Letters},
	volume = {19},
	number = {6},
	year = {2007},
	month = {2007},
	pages = {420-422},
	isbn = {1041-1135},
	url = {http://ieeexplore.ieee.org/document/4130447/},
	author = {Markidis, George and Sygletos, Stelios and Tzanakaki, Anna and Tomkos, Ioannis}
}
