| A quorum-based framework for establishing control channels in dynamic spectrum access networks Recent countries visiting this post |  |
 | 8 | United States |
 | 4 | |
 | 1 | Germany |
 | 1 | China |
| A quorum-based framework for establishing control channels in dynamic spectrum access networks Recent countries visiting this post | |
| 8 | United States |
| 4 | |
| 1 | Germany |
| 1 | China |