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Algebra and Logic > 2015 > 54 > 3 > 258-271
Discrete & Computational Geometry > 2004 > 32 > 3 > 417-430
Discrete & Computational Geometry > 2004 > 31 > 2 > 287-303
Algebra and Logic > 2015 > 54 > 3 > 258-271
Discrete & Computational Geometry > 2004 > 32 > 3 > 417-430
Discrete & Computational Geometry > 2004 > 31 > 2 > 287-303