Colossal thermoelectric power in Gd-Sr manganites S. Sagar, V. Ganesan, P. A. Joy, Senoy Thomas, A. Liebig, M. Albrecht and M. R. Anantharaman EPL, 91 1 (2010) 17008 Published online: 30 July 2010 DOI: 10.1209/0295-5075/91/17008