Finbarr Holland, Michel Bataille. Perimeter by Integral: 11256. The American Mathematical Monthly, 115(4):370-371, 2008. [doi]
@article{HollandB08, title = {Perimeter by Integral: 11256}, author = {Finbarr Holland and Michel Bataille}, year = {2008}, url = {http://www.jstor.org/stable/27642494}, researchr = {https://researchr.org/publication/HollandB08}, cites = {0}, citedby = {0}, journal = {The American Mathematical Monthly}, volume = {115}, number = {4}, pages = {370-371}, }