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Annals of Pure and Applied Logic > 2001 > 108 > 1-3 > 327-343
Discrete Mathematics > 2000 > 224 > 1-3 > 1-14
Studia Logica > 2000 > 65 > 2 > 181-198
Annals of Pure and Applied Logic > 2001 > 108 > 1-3 > 327-343
Discrete Mathematics > 2000 > 224 > 1-3 > 1-14
Studia Logica > 2000 > 65 > 2 > 181-198