| Two-stage flexible-choice problems under uncertainty Recent countries visiting this post |  |
 | 4 | United States |
 | 1 | Sweden |
 | 1 | Russian Federation |
 | 1 |
| Two-stage flexible-choice problems under uncertainty Recent countries visiting this post | |
| 4 | United States |
| 1 | Sweden |
| 1 | Russian Federation |
| 1 |