SR study of carbon-doped superconductors K. Papagelis, J. Arvanitidis, K. Prassides, A. Schenck, T. Takenobu and Y. Iwasa Europhys. Lett., 61 2 (2003) 254-260 Published online: 01 January 2003 DOI: 10.1209/epl/i2003-00102-1