| Article ID: | iaor1990879 |
| Country: | United States |
| Volume: | 37 |
| Issue: | 3 |
| Start Page Number: | 419 |
| End Page Number: | 427 |
| Publication Date: | Jun 1990 |
| Journal: | Naval Research Logistics |
| Authors: | Lee R.C.T., Ku M.T., Chang T.S. |
In this article the authors consider the unweighted