| An exact algorithm for a vehicle routing problem with time windows and multiple use of vehicles Recent countries visiting this post |  |
 | 8 | United States |
 | 5 | |
 | 3 | Thailand |
 | 1 | Russian Federation |
| An exact algorithm for a vehicle routing problem with time windows and multiple use of vehicles Recent countries visiting this post | |
| 8 | United States |
| 5 | |
| 3 | Thailand |
| 1 | Russian Federation |