A conformal field theory description of magnetic flux fractionalization in Josephson junction ladders G. Cristofano, V. Marotta, A. Naddeo and G. Niccoli Eur. Phys. J. B, 49 1 (2006) 83-91 Published online: 31 January 2006 DOI: 10.1140/epjb/e2006-00028-x