Young Biochemische Zeitschrift, 1911 , vol. 32, p. 179 Full Text Show Details Harden; Young Chem. Zentralbl., 1910 , vol. 81, # II p. 1075 Full Text Show Details v.Lebedew Biochemische Zeitschrift, 1909 , vol. 20, p. 114 Biochemische Zeitschrift, 1910 , vol. 28, p. 213