NI Rukhadze, VB Brudanin, P. Čermák, J. Čermák, J. Madathiparambil Jose, V. Král, F. Mamedov, SV Rozov, E. Rukhadze, AV Salamatin et al.: Using pixel detectors in investigations of EC/EC decay. Bulletin of the Russian Academy of Sciences: Physics 77(4), 375-378 (2013). doi:10.3103/S1062873813040229