1. US 8.981.132 8.980.780 and 8.703.983 (2014/2015 Dow); Clerici/Kholdeeva; EP 100.119 (1986 Snam‐Progetti); Jackson/Hargreaves Chapter18;
2. Yamamoto/Ishihara Chapter14;
3. Bevy Chapter7;
4. Chiusoli/Maitlis p.77;
5. Anpo/Kamat; Ertl/Knözinger/Weitkamp Vol. 5 p.2330;