(3ebOeI, aj GdWGbI GdTeSjI (B(((3dWdHI GdYdhe hGdgfOSI(B))s - (3Shd hGjOQs; (3TGcQ LGHQ TGcQ , Ndjd GHQGgje SYjOs ((3GdehUds (3eWHYI GdJYdje GdYGdj aj GdehUds, 1989)
Keywords: (3WGbI GdTeSjIs -- (3JQHjIs; (3Ydhes -- (3GdbQf GdYTQhfs