(3GdGdbGH h GSeGA GdMQa hGdhXGFa (B:s (3ai VhA GdHQOjGJ GdYQHjI (B/s 3 (3eLs - (3SYjO eZGhQi eMeOs ((3GdbGgQI (B:s (3eWHYI OGQ GdcJH GdeUQjI HGdbGgQI ,s, 2000)
(3jTJed Ydi GQLGYGJ HHdjhLQGajIs
Keywords: (3Gdafhf hGdMQas -- (3GdHdGO GdYQHjIs; (3GdUfGYGJ GdjOhjIs -- (3GdHdGO GdYQHjIs; (3GdGSeGA GdYQHjIs; (3GdJGQjN GdGSdGeis