@article{anoteonbeliefstructuresands,
  title = {A note on belief structures and S-approximation spaces},
  author = {Ali Shakiba and Amir Kafshdar Goharshady and MohammadReza Hooshmandasl and Mohsen Alambardar Meybodi},
  year = {2018},
  eprint = {1805.10672},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1805.10672v4},
}