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S. Even and O. Kariv.International Colloquium on Automata, Languages and Programming(ICALP)(8th : 1981 : Acre(akko))：Automata, Languages and Programming, annual International colloquium.Springer-Verlag,1981.
International Colloquium on Automata, Languages and Programming(ICALP)(8th : 1981 : Acre(akko))：Automata, Languages and Programming, annual International colloquium
