@article{
  author = {Seif Barghy, Mehdi, Amiri, Maghsoud, Heidari, mostafa},
  title = {Estimation of the cost function of a two-echelon inventory system with

lost sales using regression},
  journal = {Journal of Optimization in Industrial Engineering},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {55-64},
  doi = {}
}