(3GdJehjd GdeUQaj ddeTQhYGJ HUjZI QCS GdeGd (B/ s ((3HjQhJ (B:s (3GJMGO GdeUGQa GdYQHjI,s, 2000)
(3GdcJGH HdZJjf GdYQHjI h GdGfLdjRjIs
Keywords: (3GdHfhcs; (3QDhS GdGehGds