Limits on the Variation of Fundamental Atomic Quantities over Cosmic Time Scales
A. M. Wolfe, Robert L. Brown, and Morton S. Roberts
Phys. Rev. Lett. 37, 179 (1976) - Published 26 July, 1976
Nonlinear Interactions of Three Wave Packets in a Homogeneous Medium
A. Bers, D. J. Kaup, and A. H. Reiman
Phys. Rev. Lett. 37, 182 (1976) - Published 26 July, 1976