Grevsmühl U / Wagner M, A Non-Linear Canonical Transformation for the Dynamical Jahn-Teller-Problem in Cubic Symmetry (Optical Resonance Effect),
phys.stat.sol.(b) 58, 139-148, 1973

Ham F S / Grevsmühl U, Vibronic Model for the Relaxed Excited State of the F Centre, Perturbation Analysis for Weak-Coupling Limit,
Phys.Rev.B 8, 2945-2957, 1973

Grevsmühl U, Numerical investigation of the (s+p)xT1u system: I. Vibronic eigenstates and absorption spectra,
J.Phys.C: Solid State Physics 14, 665-683, 1981

Grevsmühl U, Numerical investigation of the (s+p)xT1u system: II. Reduction factors and emission spectra,
J.Phys.C: Solid State Physics 14, 685-696, 1981