Beryllium in turnoff stars of NGC 6397: Early Galaxy spallation, cosmochronology and cluster formationL. Pasquini, P. Bonifacio, S. Randich, D. Galli and R. G. GrattonA&A, 426 2 (2004) 651-657DOI: https://doi.org/10.1051/0004-6361:20041254
