PaperTransmitted Phonon Drag Effect in Germanium at Very Low TemperaturesEdward J. Walker, Robert W. KeyesPhysical Review Letters
PaperPropagation of microwave phonons in germaniumM. Pomerantz, Robert W. Keyes, et al.Physical Review Letters
ReviewTwo-level systems in the mechanical properties of silicon at low temperaturesRobert W. KeyesPhysical Review Letters