(3OjhGf cYH Hf eGdc GdCfUGQj (B/s - (3cYH Hf eGdc Hf YeQh,s (3J(B. 50 (3g`s; (3WQGO, eLjOs ((3HjQhJ (B:s (3OGQ UGOQ,s, 1997)
Keywords: (3GdTYQ GdYQHjs -- (3YUQ UOQ GdESdGe, (B610-661s