@article{
  author = {zandi, ebtehal, Nikbin, Mohanna},
  title = {Evaluating the Effectiveness of Tehran Hospitals in Attracting Medical Tourists through Grey Relational Analysis},
  journal = {Geographical Journal of Tourism Space},
  year = {2023},
  volume = {12},
  number = {46},
  pages = {19-34},
  doi = {}
}