@ARTICLE {26610,
author={M. Luís and R. Oliveira and R. Dinis and L. Bernardo},
doi={10.1109/TCCN.2017.2771558},
journal={IEEE Transactions on Cognitive Communications and Networking},
title={RF-Spectrum Opportunities for Cognitive Radio Networks Operating Over GSM Channels},
year={2017},
month={December},
volume={3},
number={4},
pages={731-739},
ISSN={2332-7731}
}