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Configuration theorems in affine plane
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A simple characterization of Boolean rings
120479788
A pentavalued logic and its algebraic theory
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On mutant sets in semigroups
120264214
On Axiom Systems of Propositional Calculi. XXI
123137276
Axiom systems of Aristotle traditional logic
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Further measure-theoretic results in curve geometry
120019573
On Tonelli's theorem concerning curve length
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On the bend of continuous plane curves
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