@article{
  author = {Rafati-‎Maleki, N., Rostamy-Malkhalifeh, M.},
  title = {‎f‎inding the defining hyperplanes of production possibility set with ‎variable‎ returns to scale using the linear independent ‎vectors‎‎},
  journal = {Journal of New Researches in Mathematics},
  year = {2018},
  volume = {4},
  issue = {3},
  pages = {53-66},
  doi = {},
  url = {https://sanad.iau.ir/fa/Article/798774}
}