Klapdor-Kleingrothaus, H. V. Prof. Dirk Schwalm, Emeriti, MPI for Nuclear Physics, Max Planck Society;
Sarkar, U. Prof. Dirk Schwalm, Emeriti, MPI for Nuclear Physics, Max Planck Society;
Klapdor-Kleingrothaus, H. V., & Sarkar, U. (2002). Neutrino mixing schemes and neutrinoless double beta decay. Physics Letters B, 532(1-2), 71-76.