A Reply to Mr. W. D. Coolidge's Paper "A Powerful Röntgen Ray Tube with A Pure Electron Discharge."RemoveJ. E. LilienfeldPhys. Rev. 3, 366 (1914)
Additional Data on The Illumination-Photo-Electric Current RelationshipRemoveHerbert E. IvesPhys. Rev. 3, 396 (1914)
