The cluster gas mass fraction as a cosmological probe: a revised studyS. Ettori, A. Morandi, P. Tozzi, I. Balestra, S. Borgani, P. Rosati, L. Lovisari and F. TerenzianiA&A, 501 1 (2009) 61-73DOI: https://doi.org/10.1051/0004-6361/200810878