Beryllium abundance in turn-off stars of NGC 6752 L. Pasquini, P. Bonifacio, S. Randich, D. Galli, R. G. Gratton and B. Wolff A&A, 464 2 (2007) 601-607 Published online: 02 January 2007 DOI: 10.1051/0004-6361:20066260