@article{knowledgereductionofdynamiccovering1,
  title = {Knowledge reduction of dynamic covering decision information systems with varying attribute values},
  author = {Mingjie Cai},
  year = {2015},
  eprint = {1504.02930},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1504.02930v1},
}