Geometric phases and the Bohr-Sommerfeld quantization of multicomponent wave fields
Robert G. Littlejohn and William G. Flynn
Phys. Rev. Lett. 66, 2839 (1991) - Published 3 June, 1991
Universal noise rise in a parametric magnetostrictive amplifier
S. T. Vohra, F. Bucholtz, K. P. Koo, and D. M. Dagenais
Phys. Rev. Lett. 66, 2843 (1991) - Published 3 June, 1991