Intrinsic localisation in the dynamics of a Josephson-junction ladder L. M. Floría, J. L. Marín, P. J. Martínez, F. Falo and S. Aubry Europhys. Lett., 36 7 (1996) 539-544 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00266-0