A2255: The first detection of filamentary polarized emission in a radio haloF. Govoni, M. Murgia, L. Feretti, G. Giovannini, D. Dallacasa and G. B. TaylorA&A, 430 1 (2005) L5-L8DOI: https://doi.org/10.1051/0004-6361:200400113