| An approach to the integration of peer-to-peer systems with active environments Recent countries visiting this post |  |
 | 4 | United States |
 | 1 | |
 | 1 | Sweden |
 | 1 | China |
| An approach to the integration of peer-to-peer systems with active environments Recent countries visiting this post | |
| 4 | United States |
| 1 | |
| 1 | Sweden |
| 1 | China |