(3GdEYdGe GdYQHj GdeTJQc (B:s (3OQGSI aj GdEYdGe GdOhdj GdYQHj (B/s - (3GdLeGd , QGSe eMeO s ((3HjQhJ (B:s (3eQcR OQGSGJ GdhMOI GdYQHjI ,s, 1985)
Keywords: (3GdEYdGe s; (3GdYQHj s