H.W. Lewis, R.J. Budnitz, et al.
Reviews of Modern Physics
By storing polarized positive muons in a magnetic field for as many as 1200 revolutions, a new upper limit to the electric dipole moment has been determined. The value is {Mathematical expression}, consistent with time-reversal invariance. © 1961 Società Italiana di Fisica.
H.W. Lewis, R.J. Budnitz, et al.
Reviews of Modern Physics
R.L. Garwin
Science
G. Charpak, F.J.M. Farley, et al.
Physical Review Letters
R.L. Garwin
Nature