1. However, Giannini and Zuccini have reported the synthesis of isotactic polymers with soluble metal alkyl-free catalyst based on benzyl derivatives of transition metals. See Chapter 12, Section III,B,2,b.
2. �thylen-Polymerisation mit ?inversen? Ziegler-Katalysatoren
3. See Chapter 4, Section II1, E.
4. See Chapter 5, Section III, A.
5. See Chapter 5, Section III, A, B.