Michael Z. Spivey. Probabilistic Proofs of a Binomial Identity, Its Inverse, and Generalizations. The American Mathematical Monthly, 123(2):175-180, 2016. [doi]
@article{Spivey16,
title = {Probabilistic Proofs of a Binomial Identity, Its Inverse, and Generalizations},
author = {Michael Z. Spivey},
year = {2016},
url = {https://www.tandfonline.com/doi/abs/10.4169/amer.math.monthly.123.2.175},
researchr = {https://researchr.org/publication/Spivey16},
cites = {0},
citedby = {0},
journal = {The American Mathematical Monthly},
volume = {123},
number = {2},
pages = {175-180},
}