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3. Łukasiewicz, J. (1910a). O Zasadzie Sprzeczności u Arystotelesa. Kraków: Akademia Umiejętności (2nd ed.). In J. Woleński (Ed.), Warsaw: PWN, 1987. Translated as: Über den Satz vom Widerspruch bei Aristoteles. Hildesheim: Olms, 1993. Del Principio di Contradizzione in Aristotele. Macerata: Quodlibet, 2003.
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