参考文献

Kruber Chemische Berichte, 1939 , vol. 72, p. 1972,1975 Teer Bitumen, 1940 , vol. 38, p. 13 Full Text Show Details Ges. Teerverwertung Patent: DE720078 , 1939 ; DRP/DRBP Org.Chem. Full Text Show Details Carruthers; Douglas Journal of the Chemical Society, 1955 , p. 1847,1849