(3CHMGK h OQGSGJ (B: (3fOhI GdecJHGJ aj HdGO GdTGe GdChdi (B/ s - (3LeYjI GdecJHGJ GdCQOfjIs ((3YeGf (B:s (3LeYjI GdecJHGJ GdCQOfjI,s, 1999)
Keywords: (3Yde GdecJHGJs; (3GdeDJeQGJs