Osborn, Helen M. I.; Williams, Nana Aba O.
Organic Letters, 2004 , vol. 6, # 18 p. 3111 - 3113

Yang, Ling-Ling; Li, Guo-Bo; Ma, Shuang; Zou, Chan; Zhou, Shu; Sun, Qi-Zheng; Cheng, Chuan; Chen, Xin; Wang, Li-Jiao; Feng, Shan; Li, Lin-Li; Yang, Sheng-Yong
Journal of Medicinal Chemistry, 2013 , vol. 56, # 4 p. 1641 - 1655

Fischer,E.
Chemische Berichte, 1900 , vol. 33, p. 1701 Anm.3

Auwers; Traun; Welde
Chemische Berichte, 1899 , vol. 32, p. 3308