Robert DeSario, LeRoy Wenstrom. Invertible Shuffles: 10931. The American Mathematical Monthly, 111(2):169-170, 2004. [doi]
@article{DeSarioW04, title = {Invertible Shuffles: 10931}, author = {Robert DeSario and LeRoy Wenstrom}, year = {2004}, url = {http://www.jstor.org/stable/4145230}, researchr = {https://researchr.org/publication/DeSarioW04}, cites = {0}, citedby = {0}, journal = {The American Mathematical Monthly}, volume = {111}, number = {2}, pages = {169-170}, }