(NmETODY KA^ESTWENNOJ TEORII DIFFERENCIALXNYH URAWNENIJ (B:s (NmEVWUZOWSKIJ SBORNIK (B/s - (NlEONTOWI^(B-(NaNDRONOWA(B, (Ne(B.(Na(B.s; (NgORXKOWSKIJ GOSUDARSTWENNYJ UNIWERSITET IM(B. (Nn(B.(Ni(B. (NlOBA^EWSKOGOs ((NgORXKIJ (B:s (NgORXKOWSKOGO GOS(B. (NUN(B-(NTA(B,s, 1987)
Keywords: (NdIFFERENCIALXNYE URAWNENIQs