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E. Woronowicz
Interpretation and satisfiability in the first order logic
Form. Math. 1 (1990), no. 4, 739-743.
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E. Woronowicz
Many-argument relations
Form. Math. 1 (1990), no. 4, 733-737.
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E. Woronowicz
Relations and their basic properties
Form. Math. 1 (1990), no. 1, 73-83.
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E. Woronowicz
Relations defined on sets
Form. Math. 1 (1990), no. 1, 181-186.
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E. Woronowicz, A. Zalewska
Properties of binary relations
Form. Math. 1 (1990), no. 1, 85-89.