The lensing system towards the doubly imaged quasar SBS 1520+530 C. Faure, F. Courbin, J. P. Kneib, D. Alloin, M. Bolzonella and I. Burud A&A, 386 1 (2002) 69-76 Published online: 15 April 2002 DOI: 10.1051/0004-6361:20020056