Random coincidence of 2ν2β decay events as a background source in bolometric 0ν2β decay experiments D.M. Chernyak, F.A. Danevich, A. Giuliani, E. Olivieri, M. Tenconi and V.I. Tretyak Eur. Phys. J. C, 72 4 (2012) 1989 Published online: 24 April 2012 DOI: 10.1140/epjc/s10052-012-1989-y