Neuhold71'

@article{DBLP:journals/ibmsj/Neuhold71,
  author    = {Erich J. Neuhold},
  title     = {The Formal Description of Programming Languages},
  journal   = {IBM Systems Journal},
  volume    = {10},
  number    = {2},
  year      = {1971},
  pages     = {86-112},
  ee        = {http://dx.doi.org/10.1147/sj.102.0086},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}