(N|LEMENTARNAQ GEOMETRIQ (B: s [(NrUKOWODSTWO DLQ [KOL (BII (NSTUPENI(B] / s - (NkISELEW(B, (NaNDREJ pETROWI^s ((NmOSKWA (B; s (NpETROGRAD (B:s (NgOS(B. (NIZD(B-(NWO(B, s, 1923)
Keywords: (NfIZIKO(B-(NMATEMATI^ESKIE NAUKI (B- (NmATEMATIKAs; (NgEOMETRIQ (B- (N|LEMENTARNAQ GEOMETRIQs