1. Siegbahn K, Nordling C, Johansson G (1969) ESCA applied to free molecules. North-Holland, Amsterdam
2. Siegbahn K, Fahlman C, Nordberg R, Hamrin K, Hedman J, Johansson G, Bergmark T, Karlsson SE, Lindgren L, Lindberg B (1967) ESCA atomic, molecular and solid state structure studied by means of electron spectroscopy, Uppsala
3. Bakke AA, Chen AW, Jolly WL (1980) J Electron Spectrosc Relat Phenom 20:33
4. Plekan O, Feyer V, Richter R, Coreno M, deSimone M, Prince KC, Trofimov AB, Gromov EV, Zaytseva IL, Schirmer J (2008) Chem Phys 347:360
5. Feyer V, Plekan O, Richter R, Coreno M, Vall-Llosera G, Prince KC, Trofimov AB, Zaytseva IL, Moskovskaya TE, Gromov EV, Schirmer J (2009) Chem Phys 113:5736