(N~ISLENNYE PROCESSY RE[ENIQ DIFFERENCIALXNYH URAWNENIJ (B/s - (NbABU[KA(B, (Ni(B.s; (NwITASEK(B, (N|(B.s; (NpRAGER(B, (Nm(B.s ((NmOSKWA (B:s (NmIRT(B,s, 1969)