RosenfeldH85'

@article{DBLP:journals/pr/RosenfeldH85,
  author    = {Azriel Rosenfeld and
               Seymour Haber},
  title     = {The perimeter of a fuzzy set},
  journal   = {Pattern Recognition},
  volume    = {18},
  number    = {2},
  year      = {1985},
  pages     = {125-130},
  ee        = {http://dx.doi.org/10.1016/0031-3203(85)90035-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}