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"Proof of the Independence of the Primitive Symbols of Heyting's Calculus ..."
J. C. C. McKinsey (1939)
- J. C. C. McKinsey:
Proof of the Independence of the Primitive Symbols of Heyting's Calculus of Propositions. J. Symb. Log. 4(4): 155-158 (1939)
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