(NpIRAT(B:s (NROMAN W (B2-(NH T(B./s (Nt(B. 1/(Nw(B. (NsKOTTs - (NsKOTT(B,(Nw(B.s (NwALXTERs; (NsKOTT(B, (NwALXTERs; (NsKOTT(B, (Nw(B.s (NwALXTERs ((Nm(B.:s (NkONTAKTs, 1991)