(3LQjeI JYGWj GdeNOQGJ aj GdbGfhf GdebGQf (B/ s - (3YjO , eMeO aJMj s ((3GdQjGV (B: s (3GdeQcR GdYQHj ddOQGSGJ GdGefjI hGdJOQjH , s, 1988)
Keywords: (3GdeNOQGJ s -- (3bhGfjf hJTQjYGJ s