(NkRAEWYE ZADA^I OBYKNOWENNYH DIFFERENCIALXNYH URAWNENIJ (B:s (NsBORNIK NAU^NYH TRUDOW (B/s - (NkLOKOW(B, (N`(B. (Na(B.s; (NlATWIJSKIJ GOSUDARSTWENNYJ UNIWERSITET IM(B. (Np(B. (NsTU^KIs ((NrIGA (B:s (NiZD(B-(NWO lATW(B. (NUN(B-(NTA(B,s, 1987)
Keywords: (NdIFFERENCIALXNYE URAWNENIQs