@article{article4072562a,
title   = {48.8 Km ultralong erbium fiber laser in active mode-locking operation},
author = {Saito, Lúcia Akemi Miyazato and Romero, Murilo Araujo and Souza, Eunézio Antonio de},
year = {2010},
doi = {10.1007/s10043-010-0071-y},
journal   = {Optical Review}
}