@article{
  author = {Yousefi, Anvar, Hadad Zadeh, Mehdi},
  title = {Presenting a Gray Marketing Model Using the Role of Influencers in Social Media},
  journal = {Journal of System Management},
  year = {2021},
  volume = {7},
  number = {3},
  pages = {67-88},
  doi = {10.30495/jsm.2021.1942794.1542}
}