(3eSjQI GdJYGhf GdNdjLi (B: s (3GdGgOGa , GdGfLGRGJ , GdJWdYGJ (B/s - (3eLdS GdJYGhf dOhd GdNdjL GdYQHjIs ((3bWQ (B: s (3GOGQI GdTFhf GdGYdGejI hRGQI GdKbGaI , s, 1990)
Keywords: (3GdJYGhf GdOhdis; (3YeGf (B- (3GdYdGbGJ GdNGQLjIs; (3GdGeGQGJ (B- (3YdGbGJ NGQLjIs; (3GdHMQjf (B- (3GdYdGbGJ GdNGQLjIs