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Bulletin of the Section of Logic > 2021 > 50 > 1 > 81-96
Discussiones Mathematicae - General Algebra and Applications > 2010 > 30 > 2 > 207-215
Bulletin of the Section of Logic > 2021 > 50 > 1 > 81-96
Discussiones Mathematicae - General Algebra and Applications > 2010 > 30 > 2 > 207-215