(Nq NA[EL TEBQ(B, (NOTEC (B:s (NrOMAN (B/ s - (NmELXNIKOW(B, (NnIKOLAJ mIHAJLOWI^(B.s ((NbRQNSK (B: s (NbRQN(B. (NRABO^IJ(B,s, 1960)
Keywords: (NsEMXQ W sssr (B((NH(B. (NL(B.)s