(3OhQ GdefXeGJ ZjQ GdMchejI aj eUQ (B: s (3Hjf GdeMOOGJ GdeMdjI hGdeJZjQGJ GdYGdejI (B/ s - (3CeGfj bfOjds ([(3ecGf GdfTQ ZjQ eMOO(B] :s [(3GdfGTQ ZjQ eMOO(B](3, s, 1995)
(3HHdjhLQGajG(B: (3UaMI (B28. s
Keywords: (3GdbGfhf GdOhdj GdYGe(B. s