(NpERFORIROWANNYE PLASTINY I OBOLO^KIs - (NgRIGOL@K(B,(N|(B. (Ni(B.s (N|DUARD iWANOWI^s; (NfILX[TINSKIJ(B,(Nl(B. (Na(B.s (NlEONID aN[ELOWI^s ((Nm(B.s (NnAUKAs, 1970)
Keywords: (NpLASTINY PERFORIROWANNYEs; (NoBOLO^KI PERFORIROWANNYEs