| Article ID: | iaor19971072 |
| Country: | Netherlands |
| Volume: | 71 |
| Issue: | 1 |
| Start Page Number: | 130 |
| End Page Number: | 132 |
| Publication Date: | Nov 1993 |
| Journal: | European Journal of Operational Research |
| Authors: | Labb M., Barros A.I. |
| Keywords: | location |
Unlike the Uncapacitated Facility Location Problem submodularity does not hold for the Multi-Level Uncapacitated Facility Location Problem. This point needs to be clarified as submodularity is assumed in some published papers and may lead to erroneous procedures to tackle the problem.