Olivier Bernardi. A Short Proof of Rayleigh's Theorem with Extensions. The American Mathematical Monthly, 120(4):362-364, 2013. [doi]
@article{Bernardi13-0,
title = {A Short Proof of Rayleigh's Theorem with Extensions},
author = {Olivier Bernardi},
year = {2013},
doi = {10.4169/amer.math.monthly.120.04.362},
url = {http://dx.doi.org/10.4169/amer.math.monthly.120.04.362},
researchr = {https://researchr.org/publication/Bernardi13-0},
cites = {0},
citedby = {0},
journal = {The American Mathematical Monthly},
volume = {120},
number = {4},
pages = {362-364},
}