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"A Note on the Multiplicative Semigroup of Models of Peano Arithmetic."
Roman Kossak, Mark E. Nadel, James H. Schmerl (1989)
- Roman Kossak, Mark E. Nadel, James H. Schmerl:
A Note on the Multiplicative Semigroup of Models of Peano Arithmetic. J. Symb. Log. 54(3): 936-940 (1989)
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