Search for double- β decay processes in 108Cd and 114Cd with the help of the low-background CdWO 4 crystal scintillator
P. Belli, R. Bernabei, F. Cappella, R. Cerulli, F. A. Danevich, S. d'Angelo, A. Incicchitti, V. V. Kobychev, S. S. Nagorny, F. Nozzoli, V. M. Mokina, D. V. Poda, D. Prosperi and V. I. Tretyak