(3GdeQLY aj GdGQTGO GdJQHhj (B: (3GdOdjd GdMOjK ddeQHj hGdeYdes - (3HjHj , gOi GdMSjfj(B, s; (3HjHj , gOi GdMSjfjs ((3GdeDdas, 2000)
1