Occurrence of radio halos in galaxy clusters - Insight from a mass-selected sampleV. Cuciti, R. Cassano, G. Brunetti, D. Dallacasa, R. Kale, S. Ettori and T. VenturiA&A, 580 (2015) A97DOI: https://doi.org/10.1051/0004-6361/201526420