(3hSGFd GdKHGJ Ydi Ojf Gddg (B:s (3JLGdhL (B/s (9) ((3GdRdaj (B- (3GdSYhOjI (B:s (3GdNQL (B- (3GdSYhOjI (B:s (3hRGQI GdTDhf GdESdGejI hGdChbGa hGdOYhI hGdEQTGO ,s, 1997)
(3GdeMJhjGJ (B: s
(3HHdjhLQGajI (B: (3UaMI s
(3GddZI GdadHjfjIs
Keywords: (3hYX hEQTGOs -- (3GdJGLGdhLs