1. Turner, D. W., Baker, A. D., Baker, C., Brundle, C. R.: Molecular photoelectron spectroscopy. New York: Wiley-Interscience 1970
2. Brundle, C. R., Robin, M. B., In: Determination of organic structures by physical methods, Vol. III. Nachod, F. C., Zuckermann, J. J. (eds.). New York: Academic Press 1971
3. Eland, J. H. D.: Photoelectron spectroscopy. London: Butterworths 1974
4. Rabalais, J. W.: Principles of ultraviolet photoelectron spectroscopy. New York: Wiley 1977
5. Heilbronner, E., Maier, J. P., In: Electron spectroscopy, theory, techniques and application. Brundle, C. R., Baker, A. D.(eds.). New York: Academic Press 1977