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Relational and Algebraic Methods in Computer Science [E-Book] : 12th International Conference, RAMICS 2011, Rotterdam, The Netherlands, May 30 – June 3, 2011. Proceedings /
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Relational Methods in Computer Science [E-Book] : 6th International Conference, RelMiCS 2001 and 1st Workshop of COST Action 274 TARSKI Oisterwijk, The Netherlands, October 16–21, 2001 Revised Papers /
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Rewriting Techniques and Applications [E-Book] : 12th International Conference, RTA 2001 Utrecht, The Netherlands, May 22–24, 2001 Proceedings /