1. A.C. Allison, The numerical solution of coupled differential equations arising from the Schrödinger equation. J. Comput. Phys. 6, 378–391 (1970)
2. C.J. Cramer, Essentials of Computational Chemistry (Wiley, Chichester, 2004)
3. F. Jensen, Introduction to Computational Chemistry (Wiley, Chichester, 2007)
4. A.R. Leach, Molecular Modelling: Principles and Applications (Pearson, Essex, 2001)
5. P. Atkins, R. Friedman, Molecular Quantum Mechanics (Oxford University Press, Oxford, 2011)