REFERENCES
- M. Boardman, Proof without words: Pythagorean runs, Math. Mag. 73 (2000) 59. http://dx.doi.org/10.2307/2691496
- R. Nelsen, Proof without words: Consecutive sums of consecutive integers, Math. Mag. 63 (1990) 25. http://dx.doi.org/10.2307/2691505