向各位同仁们求助文献：
  1、 Vairaktarakis G L.Robust multi2item newsboy models with a budget constraint[J].International Journal of Production Economics,2000,66:2132226.

2、Moon I,Silver E A.The multi2item newsvendor problem with a budgetconstraint and fixed ordering costs[J].Journal of the Operational Research Society,2000,51:6022608.
谢谢各位同仁们了！