Competition between Jahn-Teller effect and spin-orbit coupling in Td Au20±γ, γ=1,2,3 B. Molina, J. R. Soto and A. Calles Eur. Phys. J. D, 51 2 (2009) 225-231 Published online: 29 January 2009 DOI: 10.1140/epjd/e2009-00017-9