(3GdKhQI aj GdTDhf GdGSJQGJjLjI (B/ s - (3aQjOeGf, dhQGfS s ((3CHh XHj (B: s (3eQcR GdEeGQGJ ddOQGSGJ hGdHMhK GdESJQGJjLjI, s, 2000)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B. s
Keywords: (3GdCef GdOhdj s; (3GdSjGSI GdYScQjI s