Neutrinoless double-beta decay. A brief review
  In this brief review we discuss the generation of Majorana neutrino masses through the see-saw mechanism, the theory of neutrinoless double-beta decay, the implications of neutrino oscillation data for the effective Majorana mass, taking into account the recent Daya Bay measurement of theta_13, and the interpretation of the results of neutrinoless double-beta decay experiments. 
S. M. Bilenky, C. Giunti
hep-ph astro-ph.CO hep-ex