| A fast divisive clustering algorithm using an improved discrete particle swarm optimizer Recent countries visiting this post |  |
 | 9 | United States |
 | 2 | |
 | 1 | Russian Federation |
| A fast divisive clustering algorithm using an improved discrete particle swarm optimizer Recent countries visiting this post | |
| 9 | United States |
| 2 | |
| 1 | Russian Federation |