(3eTcdGJ GdHjFI GdeYGUQI (B: s (3OQGSI LZQGajI ai GdYdGbI Hjf GdGfSGf hGdHjFI (B/ s - (3eMeO YHOGdQMef GdTQfhHis ((3GdbGgQI (B: s (3ecJHI GdGfLdhGdeUQjI , s, 1993)
Keywords: (3JdhK GdHjFIs; (3GdHjFI hGdGfSGfs; (3GdLZQGajG GdHTQjIs