(3YLGFH h CSQGQ GdETYGY GdPQj h GdWGbI GdfhhjI (B/ s - (3MSH GdfHj, efUhQ eMeOs ((3GdbGgQg (B:s (3ecJHI GdfgVI GdeUQjI,s, 1992)
Keywords: (3GdPQGJs; (3GdWGbI GdfhhjIs