@article{
  author = {Hosseini, zahra Sadat, Hassan pour, Javad, Roghanian, Emad},
  title = {A Bi-objective Pre-emption Multi-mode Resource Constrained Project Scheduling Problem with due Dates in the Activities},
  journal = {Journal of Optimization in Industrial Engineering},
  year = {2014},
  volume = {7},
  number = {15},
  pages = {15-25},
  doi = {}
}