@article{
  author = {Afshar nadjafi, Behrouz, Shadrokh, Shahram},
  title = {The preemptive resource-constrained project scheduling problem subject

to due dates and preemption penalties: An integer programming approach},
  journal = {Journal of Optimization in Industrial Engineering},
  year = {2010},
  volume = {1},
  issue = {1},
  pages = {35-39},
  doi = {},
  url = {https://sanad.iau.ir/fa/Article/951405}
}