C
[CER93] Bruno Courcelle, Joost Engelfriet, and Grzegorz Rozenberg. Handle-rewriting hypergraph grammars. Journal of Computer and System Sciences 46(2). Academic Press, April 1993. 
@article{jcss46-CER93,
  author =              {Courcelle, Bruno and Engelfriet, Joost and
                         Rozenberg, Grzegorz},
  title =               {Handle-rewriting hypergraph grammars},
  publisher =           {Academic Press},
  journal =             {Journal of Computer and System Sciences},
  volume =              {46},
  number =              {2},
  year =                {1993},
  month =               apr,
  doi =                 {10.1016/0022-0000(93)90004-G},
}
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