David Beckwith. Problem 10828. The American Mathematical Monthly, 107(8):753, 2000. [doi]
@article{Beckwith00a,
title = {Problem 10828},
author = {David Beckwith},
year = {2000},
url = {http://www.jstor.org/stable/2695481},
researchr = {https://researchr.org/publication/Beckwith00a},
cites = {0},
citedby = {0},
journal = {The American Mathematical Monthly},
volume = {107},
number = {8},
pages = {753},
}