GinsburgG66a'

@article{DBLP:journals/iandc/GinsburgG66a,
  author    = {Seymour Ginsburg and
               Sheila A. Greibach},
  title     = {Mappings which Preserve Context Sensitive Languages},
  journal   = {Information and Control},
  volume    = {9},
  number    = {6},
  year      = {1966},
  pages     = {563-582},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}