Krasavtsev, I. I.
Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, # 9 p. 1775 - 1777
Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 9 p. 1989 - 1992

BASF AKTIENGESELLSCHAFT
Patent: WO2005/23743 A1, 2005 ;
Location in patent: Page/Page column 17-23, chart 1/2; 2/2 ;

Fiesselmann; Hoerndler
Chemische Berichte, 1954 , vol. 87, p. 906,910