(3GdehGQO GdeGFjI aj GdhWf GdYQHj hGdYGde (B/s - (3NVjQ, KYHGf cGXe s ((3GdbGgQI (B:s (3GdecJH GdeUQj dJhRjY GdeWHhYGJ,s, 2002)
(3HHdjhLQGajI (B: (3UaMI (B341-344.s
Keywords: (3GdejGgs -- (3LhGfH GbJUGOjIs -- (3GdHdGO GdYQHjIs; (3eUGOQ GdWGbIs -- (3GdHdGO GdYQHjIs