(3CNWQ CMcGe OSJhQjI YOe OSJhQjI EeJOGO YbO GdEjLGQ (B/s - (3TJGJ, CSGeI CMeOs ((3GdeMdI GdcHQi, eUQ (B:s (3OGQ GdcJH GdbGfhfjI,s, 1997)
(3GdeMJhjGJ (B: 1-(3ddhQGKI aj GdeMd GdJLGQj(B-2-(3dCQbGH GdeSJCLQ eUGgQI(B.s
Keywords: (3YbhO GdEjLGQ s -- (3eUQ s; (3GdEjLGQGJ s -- (3bhGfjf hJTQjYGJs -- (3eUQ s