(3JGQjN GdESdGe (B: s (3hhajGJ GdeTGgjQ hGdCYdGe (B/ s ((3HjQhJ (B: s (3OGQ GdcJH GdYdejI , s, 1997)
Keywords: (3GdJGQjN GdESdGej; JQGLe hSjQ; GdYdeGA GdeSdehfs