(3CSO GdZGHI aj eYQaI GdUMGHI (B/s - (3GHf GdCKjQ, Ydj Hf eMeO Hf YHO GdcQje,s 555-630 (3gLQjG(B.s ((3HjQhJ (B:s (3OGQ GdacQ ddWHGYI hGdfTQ hGdJhRjY,s, 1989)
Keywords: (3GdUMGHI hGdJGHYhfs -- (3JQGLes