Norman M. Martin. Some analogues of the Sheffer stroke function in n-valued logic. Koninklijke Nederlandse Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 53 (1950), pp. 1100–1107; also Indagationes mathematicae, vol. 12 (1950), pp. 393–400.
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2021 ◽
Vol 29
(1)
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pp. 143-164
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