Michael Gaul, Fred Kuczmarski. Parabolas and Archimedes' 2/3-Property. The American Mathematical Monthly, 123(5):497-501, 2016. [doi]
@article{GaulK16,
title = {Parabolas and Archimedes' 2/3-Property},
author = {Michael Gaul and Fred Kuczmarski},
year = {2016},
url = {https://www.tandfonline.com/doi/abs/10.4169/amer.math.monthly.123.5.497},
researchr = {https://researchr.org/publication/GaulK16},
cites = {0},
citedby = {0},
journal = {The American Mathematical Monthly},
volume = {123},
number = {5},
pages = {497-501},
}