Krollpfeiffer et al. Justus Liebigs Annalen der Chemie, 1949 , vol. 563, p. 15,29 Justus Liebigs Annalen der Chemie, 1950 , vol. 566, p. 139,147 Full Text Show Details Howard; Campaigne; Shriner Journal of the American Chemical Society, 1948 , vol. 70, p. 4251