@article{
  author = {Pikkala, Vijaya Laxmi, M.L., Soujanya},
  title = {Perishable Inventory Model with Retrial Demands, Negative Customers and Multiple Working Vacations},
  journal = {International Journal of Mathematical Modeling & Computations},
  year = {2017},
  volume = {7},
  number = {4},
  pages = {239-254},
  doi = {}
}