(3ebOeI aj GdGUhd GdYGeI dYde GdbGfhf GdeHGOF GdYGeI dfXQjJj GdbGfhf hGdMb (B/ s - (3GdbjGe, NGdO QTjO, s ([(3ecGf GdfTQ ZjQ eMOO(B] : s [(3GdfGTQ ZjQ eMOO(B](3 (B999.s, 1999)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B337-339.s
Keywords: (3GdbGfhf(B.s; (3fXQjI GdMb(B.s