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J. P. Coe, M. J. Paterson: Approaching exact hyperpolarizabilities via sum-over-states Monte Carlo configuration interaction. In: The Journal of Chemical Physics. Band141, Nr.12, 2014, S.124118, doi:10.1063/1.4896229, arxiv:1409.7276.
unlv.edu
physics.unlv.edu
P. Kaatz, E. A. Donley, D. P. Shelton: A comparison of molecular hyperpolarizabilities from gas and liquid phase measurements. In: The Journal of Chemical Physics. Band108, 1998, S.849–856, doi:10.1063/1.475448 (Online [PDF]).