Ag Raman modes of RBCO (R = Gd, Pr) by density functional theory approach H. Khosroabadi, A. Tavana and M. Akhavan Eur. Phys. J. B, 51 2 (2006) 161-165 Published online: 02 June 2006 DOI: 10.1140/epjb/e2006-00216-8