(3GdGSJTQGb QSGdI GSJYeGQ (B:s (3JWhQ GdZQHj eY GdESdGe (B/s - (3Gdajhej,eMeO GHQGgje s ((3GdbGgQI (B:s (3OGQ GdacQ GdYQHj ,s, 1993)
Keywords: (3GdESJTQGbs; (3GdESdGes