(3UfGYI GdbQGQ GdOhdj (B: s (3LOdjI GdYdGbI Hjf hGbYjI GdYdGbGJ GdOhdjI hbhGYO GdbGfhf GdOhdjI GdYGeI (B((3OQGSI JGUjdjI ebGQfI (B) / s - (3GdTGcQ , eMeO NGdO s ((3OeTb (B: s (3efThQGJ GdgjFI GdYGeI GdShQjI ddcJGH , s, 2011)
Keywords: (3GdbGfhf GdOhdj s