Nonperturbative (but approximate) method for solving differential equations and finding limit cycles
B. Delamotte
Phys. Rev. Lett. 70, 3361 (1993) - Published 31 May, 1993
How fast can a quantum state change with time?
Peter Pfeifer
Phys. Rev. Lett. 70, 3365 (1993) - Published 31 May, 1993
Lorentz-invariant ‘‘elements of reality’’ and the joint measurability of commuting observables
Lev Vaidman
Phys. Rev. Lett. 70, 3369 (1993) - Published 31 May, 1993