B
[BH67] Manuel Blum et Carl Hewitt. Automata on a 2-Dimensional Tape. In FOCS'67, pages 155-160. IEEE Comp. Soc. Press, octobre 1967. 
@inproceedings{focs1967-BH,
  author =              {Blum, Manuel and Hewitt, Carl},
  title =               {Automata on a 2-Dimensional Tape},
  booktitle =           {{P}roceedings of the 8th {A}nnual {S}ymposium on
                         {F}oundations of {C}omputer {S}cience ({FOCS}'67)},
  acronym =             {{FOCS}'67},
  publisher =           {IEEE Comp. Soc. Press},
  pages =               {155-160},
  year =                {1967},
  month =               oct,
}
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