@inbook{10.2307/j.ctt7ztxn5.56,
URL = {http://www.jstor.org/stable/j.ctt7ztxn5.56},
abstract = {We have discussed so far only the magnetic moment of the atom. We shall not review here the evidence, derived from the anomalous Zeeman effect, from the gyromagnetic effect, etc., that theelectronhas a fourth degree of freedom, a magnetic moment —eħ/2mc, and a mechanical moment ½ħ. We shall content ourselves with remarking that according to the Schrödinger theory the ground state of the hydrogen atom is not degenerate, and therefore, in order to account for the splitting in a magnetic field revealed by the Stern–Gerlach experiment, it is necessary to assume that the electron has a fourth},
author = {Nevill F. Mott and Harrie S.W. Massey},
booktitle = {Quantum Theory and Measurement},
pages = {701--706},
publisher = {Princeton University Press},
title = {MAGNETIC MOMENT OF THE ELECTRON},
year = {1983}
}