(3GdEYdGe hGdLQjeI (B: s (3LQGFe GdQCj hGdEYdGe (B/ s - (3UObj, YHO GdQMje s ((3GdbGgQI (B: s (3ecJHI fgVI GdTQb, s, 1987)
(3HHdjhLQGajI (B: (3U(B. 173-178.s
Keywords: (3GdEYdGe s -- (3bhGfjf hJTQjYGJ s -- (3eUQ s; (3GdQCj GdYGe s -- (3eUQ s; (3GdLQjeI hGdeLQehfs -- (3eUQ s; (3GdUMGaI s -- (3bhGfjf hJTQjYGJ s -- (3eUQ s