van Romburgh Akad.Amsterdam Versl., vol. 18, p. 178 Chem. Zentralbl., 1910 , vol. 81, # I p. 1242 Full Text Show Details Hantzsch Chemische Berichte, 1910 , vol. 43, p. 1651 Chemische Berichte, 1911 , vol. 44, p. 2003