@conference {Rico2011, title = {On the Co-existence of Primary and Secondary Transmitters in a Broadcast Network}, booktitle = {International Conference on Cognitive Radio and Advanced Spectrum Management}, year = {2011}, address = {Barcelona, Catalonia, Spain}, keywords = {Broadcast, cognitive radio, Overlay, Single Frequency Network}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} }