1. For example: Pino, P. and Mulhapt, R., Angew. Chem. Int. Engl. Ed., 1980, 19, 857. Barbe, P.C., Cecchin, G. and Noristi, L., Ad. Polym. Sci., 1987, 81, 1. Albizatti, E., Giannini, U., Morini, G., Smith, C.A. and Ziegler, R., Ziegler Catalysts — Recent Scientific Innovations and Technological Improvements, eds. Fink, G., Mulhaupt, R. and Brintzinger, H.H., Springer-Verlag, Berlin, 1995, p. 413.
2. Soga, K., Shiono, T. and Yanagihara, H., Makromol. Chem., Rapid Commun., 1986, 7, 719.
3. Soga, K., Uozumi, T. and Shiono, T., Makromol. Chem., Rapid Commun., 1986, 10, 293.
4. Additive Effects of Lewis Bases on Propene Polymerization over MgCl2-Supported TiCl4 Catalysts Combined with Cp2TiMe2
5. EP 361494 (1990), Himont Inc.; invs. Albizzati, E., Barbe, P.C., Noristi, L., Scordamaglia, R., Barino, L., Giannini, U. and Morini, G., Chem. Abstr. 1990, 113, 1533260m.