(3LQGFe GdGeJfGY aj bGfhf GdYbhHGJ (B:s (3TQM JaUjdj ddfXGe GdbGfhfj dLQGFe GdGeJfGY aj GdTQjYI GdESdGejI hGdbGfhf GdhVYj (B/s - (3eQGO, YHO GdaJGM(B.s ((3GdEScfOQjI, eUQ (B:s (3efTCI GdeYGQa,s, 1990)
(3HHdjhLQGajI (B: (3UaMI (B429-440.s
Keywords: (3LQGFe GdGeJfGYs -- (3bhGfjf hJTQjYGJs; (3LQGFe GdGeJfGY (B((3abg ESdGej(B)s