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"From sets to functions: Three elementary examples."
S. A. Joni, Gian-Carlo Rota, Bruce E. Sagan (1981)
- S. A. Joni, Gian-Carlo Rota, Bruce E. Sagan:
From sets to functions: Three elementary examples. Discret. Math. 37(2-3): 193-202 (1981)
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