Clutterbuck; Raistrick; Rintoul Phil. Trans. , 1931 , vol. 220, p. 327 Chem. Zentralbl., 1932 , vol. 103, # I p. 1108 Full Text Show Details Thomas; Weitzel; Neumann Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1947 , vol. 282, p. 196 Full Text Show Details Staellberg-Stenhagen Arkiv foer Kemi, 1946 , vol. 20 A, # 19 p. 5,7, 12