Douglas B. Tyler. Problem 11065. The American Mathematical Monthly, 111(2):166, 2004. [doi]
@article{Tyler04, title = {Problem 11065}, author = {Douglas B. Tyler}, year = {2004}, url = {http://www.jstor.org/stable/4145223}, researchr = {https://researchr.org/publication/Tyler04}, cites = {0}, citedby = {0}, journal = {The American Mathematical Monthly}, volume = {111}, number = {2}, pages = {166}, }