(3eGKjeGJjcG GdQjGVjGJ HESJNOGe GdcheHjhJQ (B/ s - (3QRb Gddg, QCaJ QjGV s ((3GdbGgQg (B: s (3GdecJHI GdGcGOjejI, s, 2000)
Keywords: (3GdQjGVjGJ(B. s; (3GdJaGVd hGdJcGed(B. s; (3GdeUahaGJ(B. s; (3JWHjbGJ GdMGShH(B. s