Structure of the magnetoionic medium around the Fanaroff-Riley Class I radio galaxy 3C 449 D. Guidetti, R. A. Laing, M. Murgia, F. Govoni, L. Gregorini and P. Parma A&A, 514 (2010) A50 Published online: 12 May 2010 DOI: 10.1051/0004-6361/200913872