(3CHMGK ai JGQjN GdTQGFY GdbOjeI (B/s - (3eMehO GdSbG(B.s ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI ,s, 1997)
(3jTJed Ydi (B: (3eUQ GdaQYhfjI (B- (3GdbGfhf GdHGHdi (B- (3TQjYI GdjghOs
Keywords: (3TQjYI GdjghOs; (3GdbGfhf GdbOje s -- (3GdYQGbs