(3GdShb GdYQHjI GdeTJQcI aj YUQ GdYhdeI (B/ s - (3GdefPQj, SdjeGfs ((3GdbGgQI (B: s (3ecJHI eOHhdj, s, 1999)
(3HHdjhLQGajI (B: (3UaMI (B269-274. s
Keywords: (3GdYdGbGJ GdGbJUGOjI GdOhdjI s; (3GdYhdeI s -- (3LhGfH GbJUGOjI s