(NkRAEWYE ZADA^I DLQ URAWNENIJ S ^ASTNYMI PROIZWODNYMI (B/s - (NgODUNOW(B, (Ns(B. (Nk(B.s ((NnOWOSIBIRSK (B:s (Nb(B. (NI(B.,s, 1984)
Keywords: (NwYS[AQ MATEMATIKAs