Apanasenko A.V. , Smorodin Y.A. , Bogomolov K.S. , Chikunova E.S. , Gadiullin R.S. , Ivanov V.O. , Khruleva L.S. , Kuznetsova G.G. , Mulzeva V.A. , Sokolovskaya I.N. Nuclear film R-2T-50 for cosmic rays. 9 Conf. on solid state nuclear track detectors. Neuherberg. Munchen , Vol.1 , с. P.553-563 , 01.1976