GinsburgR62'

@article{DBLP:journals/jacm/GinsburgR62,
  author    = {Seymour Ginsburg and
               H. Gordon Rice},
  title     = {Two Families of Languages Related to ALGOL},
  journal   = {J. ACM},
  volume    = {9},
  number    = {3},
  year      = {1962},
  pages     = {350-371},
  ee        = {http://doi.acm.org/10.1145/321127.321132},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}