(NpOW)QÆT (B:s)E (NROMAN (B/s - (NuSENKO(B, (Np(B. (Nm(B.s; (NtELXN@KA(B, (Ns(B. (Nw(B.s ((NkI)QÇW (B:s)E (NmOLODX(B,s, 1987)