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Logical Foundations of Computer Science [E-Book] : 4th International Symposium, LFCS'97, Yaroslavl, Russia, July, 6 - 12, 1997, Proceedings /
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Logical Foundations of Computer Science [E-Book] : International Symposium, LFCS 2007, New York, NY, USA, June 4-7, 2007. Proceedings /