Witt; Bergman
Journal of Organic Chemistry, 2001 , vol. 66, # 8 p. 2784 - 2788

Borza, Istvan; Kolok, Sandor; Galgoczy, Kornel; Gere, Aniko; Horvath, Csilla; Farkas, Sandor; Greiner, Istvan; Domany, Gyoergy
Bioorganic and Medicinal Chemistry Letters, 2007 , vol. 17, # 2 p. 406 - 409