(3bhGYO GdOQGSI aj GdLGeYI (B: s (3Odjd dSeGYOI GdWGdH ddOQGSI aj LGeYGJ h eDSSGJ GdJYdje GdYGdj aj GdhWf GdYQHj (B/ s - (3GdJd, SYjOs ((3YeGf (B:s (3OGQ GdacQ,s, 1997)
Keywords: (3GdJYdje GdYGdjs; (3GdcdjGJ h GdLGeYGJs