Kvalnes Journal of the American Chemical Society, 1934 , vol. 56, p. 2478,2479 Full Text Show Details Asano; Kameda Yakugaku Zasshi, 1939 , vol. 59, p. 768,773;dtsch.Ref.S.291 Chem. Zentralbl., 1940 , vol. 111, # I p. 2466