Conduction mechanism and magnetoresistance in Gd1-xPrxBaCaCu3O7-δ M. Kariminezhad and M. Akhavan Eur. Phys. J. B, 47 1 (2005) 47-53 Published online: 21 September 2005 DOI: 10.1140/epjb/e2005-00295-y