Coherent states in a multi-junction superconducting loop M. Darula, S. Beuven, M. Siegel, P. Seidel and A. Darulova Europhys. Lett., 33 1 (1996) 41-46 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00301-2