(NdIFFERENCIALXNAQ TOPOLOGIQ (B/s - (NhIR[(B, (Nm(B.s; (NfUKS(B, (Nd(B.(Nb(B.s ((NmOSKWA (B:s (NmIR (B,s, 1979)
(NsPISOK LIT(B. (NS(B. 271-274s
Morris W. Hirsch -