Pierce70'

BibTeX

@article{DBLP:journals/mst/Pierce70,
  author    = {R. S. Pierce},
  title     = {Classification Problems},
  journal   = {Mathematical Systems Theory},
  volume    = {4},
  number    = {1},
  year      = {1970},
  pages     = {65-80},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}