1. Naunyn-Schmiedebergs Arch.184, 170 (1937).
2. Wiechowski: Abderhaldens Handb.3 (1910).
3. Neuberg u. Simon: Biochem. Z.156, 365 (1925).
4. Arnoldi: Naunyn-Schmiedebergs Arch.73, 1; Arnoldi-Kucera: Ebenda Naunyn-Schmiedebergs Arch.79, 311.
5. Wetzel: Naunyn-Schmiedebergs Arch.179, 92 (1935).