(3GdJQLeI GdGYdGejI (B1 :s (3GdCSS hGdJWHjbGJ (B/s - (3CMeO bfOjd,QGLjI s; (3gTGe YWjI YHO GdebUhO s ((3eUQ (B:s (3eQcR LGeYI GdbGgQI ddJYdje GdeaJhM ,s, 1999)
Keywords: (3GdGYdGe s; (3GdJQLeI s