Recurrence Phenomena in Quantum Dynamics
T. Hogg and B. A. Huberman
Phys. Rev. Lett. 48, 711 (1982) - Published 15 March, 1982
Evidence for Universal Chaotic Behavior of a Driven Nonlinear Oscillator
James Testa, José Pérez, and Carson Jeffries
Phys. Rev. Lett. 48, 714 (1982) - Published 15 March, 1982