1. C.J. Allan and K. Siegbahn, in T.S. West (editor), Electron Spectroscopy for Chemical Application, in MTP International Review of Science, Medical and Technical Publ. Co. Ltd., England, in press.
2. D.M. Hercules, Anal. Chem., in press.
3. ESCA—Atomic, Molecular and Solid State Structure Studied by Means of Electron Spectroscopy;Siegbahn,1967