Doping dependence of infrared conductivity of camphor-sulphonic-acid-doped polyaniline F. Gervais, N. Petit, C. Popon and P. Buvat Eur. Phys. J. B, 31 1 (2003) 47-52 Published online: 27 January 2003 DOI: 10.1140/epjb/e2003-00007-9