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- Recounting the Rationals: Twice! [PDF] http://www.cs.nott.ac.uk/~psarb2/mpc/recountingrationalstwice.pdf 5 comments compsci
- Recounting the Rationals [PDF] http://www.math.upenn.edu/~wilf/website/recounting.pdf 4 comments math
- The Math Less Traveled: Recounting the Rationals http://www.mathlesstraveled.com/?p=94 3 comments math