Kunckell Chem. Zentralbl., 1912 , vol. 83, # I p. 134 Full Text Show Details Kunckell Chemische Berichte, 1900 , vol. 33, p. 2647,2649 Chem. Zentralbl., 1900 , vol. 71, # I p. 240 Full Text Show Details Kunckell Chem. Zentralbl., 1900 , vol. 71, # I p. 240