@article {MATHEDUC.06495931,
author = {Karamzadeh, O. A. S.},
title = {Johnson's three circles theorem revisited.},
year = {2014},
journal = {The College Mathematics Journal},
volume = {45},
number = {3},
issn = {0746-8342},
pages = {217-218},
publisher = {Mathematical Association of America (MAA), Washington, D.C.},
doi = {10.4169/college.math.j.45.3.217},
abstract = {Summary: A new elementary proof of Johnson's Theorem follows from a result on three arbitrary circles that meet in a point.},
msc2010 = {G45xx},
identifier = {2015f.00710},
}