(3dbjWI (B/ s - (3eMeO YHOGdMdje YHOGddgs ((3GdbGgQI (B: s (3OGQ eUQ ddWHGYI , s, 1989)
Keywords: (3GdGOH GdYQHis; (3GdbUU GdYQHjIs; (3GdbUU GdQhSjIs