A hard X-ray view of giga-hertz peaked spectrum radio galaxies M. Guainazzi, A. Siemiginowska, C. Stanghellini, P. Grandi, E. Piconcelli and C. Azubike Ugwoke A&A, 446 1 (2006) 87-96 Published online: 09 January 2006 DOI: 10.1051/0004-6361:20053374