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"q-Analogs of the inclusion- exclusion principle and permutations with ..."
William Y. C. Chen, Gian-Carlo Rota (1992)
- William Y. C. Chen, Gian-Carlo Rota:
q-Analogs of the inclusion- exclusion principle and permutations with restricted position. Discret. Math. 104(1): 7-22 (1992)
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