Six-Set Approximation Theorem of neighborhood related rough sets

Liwen Ma, Hui Lu. Six-Set Approximation Theorem of neighborhood related rough sets. Int. J. Approx. Reasoning, 115:180-193, 2019. [doi]

@article{MaL19-18,
  title = {Six-Set Approximation Theorem of neighborhood related rough sets},
  author = {Liwen Ma and Hui Lu},
  year = {2019},
  doi = {10.1016/j.ijar.2019.09.011},
  url = {https://doi.org/10.1016/j.ijar.2019.09.011},
  researchr = {https://researchr.org/publication/MaL19-18},
  cites = {0},
  citedby = {0},
  journal = {Int. J. Approx. Reasoning},
  volume = {115},
  pages = {180-193},
}