@article{DBLP:journals/fuin/YaoZMX12,
  author    = {Yiyu Yao and
               Nan Zhang and
               Duoqian Miao and
               Feifei Xu},
  title     = {Set-theoretic Approaches to Granular Computing},
  journal   = {Fundam. Inform.},
  volume    = {115},
  number    = {2-3},
  year      = {2012},
  pages     = {247-264},
  ee        = {http://dx.doi.org/10.3233/FI-2012-653},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}