(3JGQjN GdadSaI GdjhfGfjI ef efXhQ TQbj (B:s (3L(B1 (3GdSGHbhf Ydi GdShaSWGFjjf(B/s - (3eUWai GdfTGQs ((3GdbGgQI (B: s (3OGQ bHGA ddWHGYI hGdfTQ hGdJhRjY , s, 2000)
Keywords: (3GdadSaI GdjhfGfjIs; (3SbQGWs; (3GadGWhfs; (3GdadGSaI GdjhfGfjhfs