1. WO 98/07.673 (1998); US 5.847.255 (1998); US 5.847.254 (1998 Huntsman); US 5.847.253 (1998 UOP); EP 0.190.101 (1986 CIBA); DE 2.328.340 (1973 CIBA); Kirk/Othmer‐1 Vol. 2 p.85;
2. Treese/Pujàdo/Jones Chapter; Kirk/Othmer‐2 p.71;
3. McKetta‐1 Vol. 2 p.414;
4. McKetta‐2 p.80;
5. Ullmann Vol.A1 p.185;