Marian Przełęcki

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Inessential parts of extensions of first-order theories

Ryszard Wójcicki, Marian Przełęcki, 1971 .

Formal methods in the methodology of empirical sciences : proceedings of the Conference for Formal Methods in the Methodology of Empirical Sciences, Warsaw, June 17-21, 1974

Klemens Szaniawski, Ryszard Wójcicki, Marian Przełęcki, 1976 .