A search for diffuse radio emission in the relaxed, cool-core galaxy clusters A1068, A1413, A1650, A1835, A2029, and OphiuchusF. Govoni, M. Murgia, M. Markevitch, L. Feretti, G. Giovannini, G. B. Taylor and E. CarrettiA&A, 499 2 (2009) 371-383DOI: https://doi.org/10.1051/0004-6361/200811180