Enhancement of magnetoresistance in cobaltites by manganese substitution: the oxide La0.8Sr0.2Co1-xMnxO3 A. Maignan, C. Martin, M. Hervieu and B. Raveau Eur. Phys. J. B, 13 1 (2000) 41-45 Published online: 15 January 2000 DOI: 10.1007/s100510050008