Finbarr Holland. Problem 11361. The American Mathematical Monthly, 115(4):366, 2008. [doi]
@article{Holland08-1, title = {Problem 11361}, author = {Finbarr Holland}, year = {2008}, url = {http://www.jstor.org/stable/27642488}, researchr = {https://researchr.org/publication/Holland08-1}, cites = {0}, citedby = {0}, journal = {The American Mathematical Monthly}, volume = {115}, number = {4}, pages = {366}, }