Donald E. Knuth, Richard Stong. Animals in a Cage: 10875. The American Mathematical Monthly, 110(3):243-245, 2003. [doi]
@article{KnuthS03, title = {Animals in a Cage: 10875}, author = {Donald E. Knuth and Richard Stong}, year = {2003}, url = {http://www.jstor.org/stable/3647949}, researchr = {https://researchr.org/publication/KnuthS03}, cites = {0}, citedby = {0}, journal = {The American Mathematical Monthly}, volume = {110}, number = {3}, pages = {243-245}, }