@article{
  author = {KHALAJJ, ELHAM, mohammadi, shahriyar},
  title = {Presenting the model for opinion mining at the document feature level for hotel users' reviews},
  journal = {Journal of Information and Communication Technology},
  year = {2021},
  volume = {13},
  number = {49},
  pages = {85-102},
  doi = {}
}