G
[GRS+96] Dora Giammarresi, Antonio Restivo, Sebastian Seibert, and Wolfgang Thomas. Monadic Second-Order Logic over Rectangular Pictures and Recognizability by Tiling Systems. Information and Computation 125(1):32-45. Academic Press, February 1996. 
@article{icomp125(1)-GRST,
  author =              {Giammarresi, Dora and Restivo, Antonio and Seibert,
                         Sebastian and Thomas, Wolfgang},
  title =               {Monadic Second-Order Logic over Rectangular Pictures
                         and Recognizability by Tiling Systems},
  publisher =           {Academic Press},
  journal =             {Information and Computation},
  volume =              {125},
  number =              {1},
  pages =               {32-45},
  year =                {1996},
  month =               feb,
  doi =                 {10.1006/inco.1996.0018},
}
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