(3GdehShYI GdJLGQjI hGdeUQajI (B: s " (3OQGSI ebGQfI(B" / s - (3GdcjdGfj, eMehOs ((3YeGf (B: s (3OGQ GdKbGaI ddfTQ h GdJhRjY, s, 2006)
Keywords: (3GdbGfhf GdJLGQj(B. s; (3GdHfhc(B. s