Quantum chemical modelling of “green” luminescence in ABO3 perovskites R. I. Eglitis, E. A. Kotomin and G. Borstel Eur. Phys. J. B, 27 4 (2002) 483-486 Published online: 25 June 2002 DOI: 10.1140/epjb/e2002-00181-2