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university of lodz. department of logic. bulletin of the section of logic (13)
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contributions to general algebra, 7 (vienna, 1990) (3)
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multiple-valued logic. an international journal (2)
order. a journal on the theory of ordered sets and its applications (2)
sibirskie elektronnye matematicheskie izvestiya. siberian electronic mathematical reports (2)
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studia logica: an international journal for symbolic logic (2)
universal and applied algebra (turawa, 1988) (2)
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