1. Helgaker, T., Jaszunski, M. and Ruud, K. (1999). Ab initio methods for the calculation of NMR shielding and indirect spin-spin coupling constants. Chem. Rev.99, 293–352
2. Kutzelnigg, W., Fleischer, U. and Schindler, M. (1990). In NMR Basic Principles and Progress, Vol. 23, pp. 165. Springer-Verlag, Berlin Heidelberg
3. Magnetic properties in terms of localized quantities. 5. Carbocations
4. Siehl, H.-U. and Vrcek, V. (2004). Calculation of NMR parameters in carbocation chemistry. In Calculation of NMR and EPR Parameters, Theory and Applications, Kaupp, M., Bühl, M. and Malkin, V.G. (eds), Chapter 23, pp. 373–397. Wiley-VCH, Weinheim, Germany
5. Strukturen von Carbokationen