1. , , Ziegler Catalysts, Springer, Berlin, 1995.
2. For example, see: Polymeric Materials Encyclopedia, Vol. 8 (Ed.: ), CRC, Boca Raton, 1996, p. 5966.
3. US Patent 4,752,597, 1988;
4. , , US Patent 5,470,927, 1995;
5. , , , , , , , Eur. Patent Appl. 416 815A2, 1991;