Nordling, Carl; Sokolowski, Evelyn; Siegbahn, Kai (1957). «Precision Method for Obtaining Absolute Values of Atomic Binding Energies». Physical Review105 (5): 1676. Bibcode:1957PhRv..105.1676N. doi:10.1103/PhysRev.105.1676.
Turner, D. W.; Jobory, M. I. Al (1962). «Determination of Ionization Potentials by Photoelectron Energy Measurement». The Journal of Chemical Physics37 (12): 3007. Bibcode:1962JChPh..37.3007T. doi:10.1063/1.1733134.
Nordling, Carl; Sokolowski, Evelyn; Siegbahn, Kai (1957). «Precision Method for Obtaining Absolute Values of Atomic Binding Energies». Physical Review105 (5): 1676. Bibcode:1957PhRv..105.1676N. doi:10.1103/PhysRev.105.1676.
Turner, D. W.; Jobory, M. I. Al (1962). «Determination of Ionization Potentials by Photoelectron Energy Measurement». The Journal of Chemical Physics37 (12): 3007. Bibcode:1962JChPh..37.3007T. doi:10.1063/1.1733134.