(3GdYhdeI GdJLGQjI hGdEOGQjI hGdbGfhfjI (B:s (3QDjI ESdGejI LOjOI(B.s (3GdLRA GdChd,s (3GdfeGPL (B/s - (3CHh UbQ, cGeds ((3HjQhJ (B:s (3OGQ GdhSGe (B:s (3OGQ hecJHI GdgdGd,s, 2000)
(3HHdjhLQGajI (B: (3U(B. 431-436.s
Keywords: (3GdJLGQI GdNGQLjIs; (3GdESdGe hGdGbJUGOs; (3GdESdGe hGdJLGQIs; (3GdYhdeIs -- (3LhGfH GbJUGOjIs