(3GdYbhO GdJLGQjI hYbO GdHjY Sja (Bc i f (3OQGSI ebGQfI (B/s - (3MSf OjGH s ((3HjQhJ (B:s (3GdeDSSI GdLGeYjI ddOQGSGJ hGdfTQ hGdJhRjY,s, 1999)
Keywords: (3GdYbhO GdJLGQjI s; (3GdJLGQI GdOhdjI s