(NdIFFERENCIALXNYE URAWNENIQ S ^ASTNYMI PROIZWODNYMI (B:s (NmEVWUZ(B. (NSB(B. (NNAU^(B. (NTR(B. /s - (NmATWEEW(B, (Nn(B.(Nm(B.s; (NlENINGRADSKIJ GOSUDARSTWENNYJ PEDAGOGI^ESKIJ INSTITUT IM(B. (Na(B.(Ni(B. (NgERCENAs ((NlENINGRAD (B:s (Nlgpi(B,s, 1990)
Keywords: (NmATEMATIKAs; (NdIFFERENCIALXNYE URAWNENIQ S ^ASTNYMI PROIZWODNYMIs