Suppression of superconductivity in layered Bi4O4S3 by Ag doping S.G. Tan, P. Tong, Y. Liu, W.J. Lu, L.J. Li, B.C. Zhao and Y.P. Sun Eur. Phys. J. B, 85 12 (2012) 414 Published online: 24 December 2012 DOI: 10.1140/epjb/e2012-30975-2