Majorana neutrinos and other Majorana particles:Theory and experiment
  This is a somewhat modified version of Chapter 15 of the book "The Physics of Ettore Majorana", by Salvatore Esposito with contributions by Evgeny Akhmedov (Ch. 15) and Frank Wilczek (Ch. 14), Cambridge University Press, 2014. 
Evgeny Akhmedov (Heidelberg, Max Planck. Inst.)
hep-ph astro-ph.SR hep-ex