| Article ID: | iaor20041208 | 
| Country: | Netherlands | 
| Volume: | 31 | 
| Issue: | 5 | 
| Start Page Number: | 335 | 
| End Page Number: | 340 | 
| Publication Date: | Sep 2003 | 
| Journal: | Operations Research Letters | 
| Authors: | Dahl Geir, Foldnes Njl | 
| Keywords: | knapsack problem | 
We study the knapsack polytopes that arise whenever the item weights are of two types: either of weight 1 or of weight