(3efgL GdYdGbGJ GdYGeI hGdEYdGe (B:s (3GdYdGbGJ GdOhdjI(B.s (3L(B. 1 / s - (3eQcR GdNHQGJ GdegfjI ddEOGQI (B((3GdbGgQI(B)s; (3Jhajb, YHO GdQMefs ((3GdbGgQI (B:s (3eQcR GdNHQGJ GdegfjI ddEOGQI,s, 2007)
Keywords: (3GdYdGbGJ GdYGeI s; (3GdEYdGe s