Static Approximation and Bounds on Single-Channel Phase ShiftsYukap Hahn, Larry Spruch, Thomas F. O'Malley|Physical Review|1962Cited by 176
Dominant Nonadiabatic Contribution to the Long-Range Electron-Atom InteractionChemia J. Kleinman, Larry Spruch, Yukap Hahn|Physical Review|1968Cited by 160
Improved Minimum Principle for Multichannel ScatteringYukap Hahn, Larry Spruch, Thomas F. O'Malley|Physical Review|1964Cited by 79
Bounds on Multichannel Scattering ParametersYukap Hahn, Larry Spruch, Thomas F. O'Malley|Physical Review|1964Cited by 65