1. Lichtwitz, Klin. Chemie 1918.
2. Bechhold, Die Kolloide in Biologie und Medizin 1922.
3. T. B.Reevers, A study of the arteries supplying the stomach and duodenum with their relation to ulcer. Collected Papers of the Mayo Clinic, Volume XI. 1919.
4. Robert McCarrison, Studies in deficiency disease 1921.