(3JQHjI eTGYQ GdCWaGd aiGdCSQI (B/ s - (3chdJTjJScGjG, j (B0 (3Gs ((3ShQjG (B: s (3efThQGJ OGQ YdGAGdOjf , s, 2000)
Keywords: (3GdGWaGd (B- (3JQHjIs; (3GdGWaGd, Yde faSs; (3GdGWaGd (B- (3GfaYGdGJ faSjIs; (3GdGWaGd (B- (3GdTYhQs