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"Monotone Proofs of the Pigeon Hole Principle."
Albert Atserias, Nicola Galesi, Ricard Gavaldà (2001)
- Albert Atserias, Nicola Galesi, Ricard Gavaldà:
Monotone Proofs of the Pigeon Hole Principle. Math. Log. Q. 47(4): 461-474 (2001)
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