Comparison of methods for calculating Franck-Condon factors beyond the harmonic approximation: How important are Duschinsky rotations?. Mol. Phys., (113)23:3859–3873, 2015. [PUMA: chemie from:alexanderdenzel rauhut Duschinsky rotation,Franck-Condon factors,Watson theoretische stuttgart Hamiltonian theochem] URL