1. Nakajima; Bird/Stewart/Lightfoot; Glavatskiy; Helfferich p. 290 ff; Ertl/Knözinger/Schüth/Weitkamp Vol. 3 p.1727;
2. Speight/Özüm p.267;
3. Vannice; Bird/Stewart/Lightfoot; Ertl/Knözinger/Weitkamp Vol. 3 p.1209;
4. Wijngaarden/Kronberg/Westerterp p. 61 141;