Control of bulk and surface radioactivity in bolometric searches for double-beta decay M. Pavan, C. Callegaro, S. Capelli, M. Carrettoni, M. Clemenza, L. Gironi, P. Gorla, C. Maiano, C. Nones and M. Pedretti Eur. Phys. J. A, 36 2 (2008) 159-166 Published online: 13 May 2008 DOI: 10.1140/epja/i2007-10577-0