Computable Queries for Relational Data Bases.

Ashok K. Chandra, David Harel: Computable Queries for Relational Data Bases. J. Comput. Syst. Sci. 21(2): 156-178(1980)

@article{DBLP:journals/jcss/ChandraH80,
  author    = {Ashok K. Chandra and
               David Harel},
  title     = {Computable Queries for Relational Data Bases},
  journal   = {J. Comput. Syst. Sci.},
  volume    = {21},
  number    = {2},
  year      = {1980},
  pages     = {156-178},
  ee        = {db/journals/jcss/ChandraH80.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

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