(NdIFFERENCIALXNYE URAWNENIQ W ^ASTNYH PROIZWODNYH WTOROGO PORQDKA (B:s (Nu^EBNOE POSOBIE (B/s - (NsMIRNOW(B, (NmODEST mIHAJLOWI^s ((NmINSK (B:s (NiZD(B-(NWO bgu IM(B. (Nw(B.(Ni(B. (NlENINA(B,s, 1974)
Keywords: (NdIFFERENCIALXNYE URAWNENIQs