Hungerbühler, Norbert (1994), «A short elementary proof of the Mohr-Mascheroni theorem», The American Mathematical Monthly, 101 (8): 784–787, MR1299166, doi:10.2307/2974536.
Hungerbühler, Norbert (1994), «A short elementary proof of the Mohr-Mascheroni theorem», The American Mathematical Monthly, 101 (8): 784–787, MR1299166, doi:10.2307/2974536.