(NwYS[AQ MATEMATIKA (B:s (Nu^EBNIK DLQ ESTESTWENNYH FAKULXTETOW UNIWERSITETOW (B/s - (NsAHARNIKOW(B, (NnIKOLAJ aLEKSEEWI^(B.s; (NlENINGRADSKIJ GOSUDARSTWENNYJ UNIWERSITET IM(B. (Na(B.(Na(B. (NvDANOWAs ((NlENINGRAD (B:s (Nlgu(B,s, 1973)
Keywords: (NwYS[AQ MATEMATIKAs