(3VeGfGJ GdbGVj aj GdYQGb (B:s (3OQGSI ebGQfI (B/s - (3GdRHjOj, eMeO MSf(B.s ([(3O(B. (3e (B:s (3O(B. (3f(B](3,s, 1985)
(3HHdjhLQGajI (B: (3U(B. 87-93.s
Keywords: (3GdbVGAs -- (3GdYQGbs