Automata, Languages and Programming: 18th International Colloquium Madrid, Spain, July 8–12, 1991 Proceedings
Albert, Javier Leach ; Monien, Burkhard ; Artalejo, Mario Rodríguez Albert, Javier Leach ; Monien, Burkhard ; Artalejo, Mario Rodríguez
Berlin, Heidelberg: Springer Berlin Heidelberg 1991
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