Wei, Cheng-Xi; Wu, Di; Sun, Zhi-Gang; Chai, Kyu-Yun; Quan, Zhe-Shan
Medicinal Chemistry Research, 2010 , vol. 19, # 8 p. 925 - 935

Fischer,O.; Roemer
Journal fuer Praktische Chemie (Leipzig), 1906 , vol. <2>73, p. 442ff.