(3GaYGd GdbOhe aj GdbQBf GdcQje (B: s ((3OQGSI OdGdjI(B) / s ((3GdYQGb (B: s (3GdecJH GdLGeYj GdMOjK , s, 2012)
Keywords: (3GdJaSjQ hYdhe GdbQGfs