(NuSTOJ^IWYE OTOBRAVENIQ I IH OSOBENNOSTI (B/s - (NgOLUBICKIJ(B, (Nm(B.s; (NgIJEMIN(B, (Nw(B.s; (NkU[NIRENKO(B, (Na(B.(Ng(B.s; (NaRNOLXD(B, (Nw(B.(Ni(B.s ((NmOSKWA (B:s (NmIR(B,s, 1977)
M. Golubitsky, V. Guillemin -
Keywords: (NgEOMETRIQs