(3YHO GdbGOQ GdLRGFQj (B/s - (3EJjjf,HQhfh s; (3ejTjd(B,(3NhQj s ((3GdLRGFQ (B:s (3GdeDSSI GdhWfjI ddGJUGd h GdfTQ h GdGTgGQ ,s, 2001)
Keywords: (3GdLRGFQj s; (3YHO GdbGOQ s