1. : In „The Differentiation and Specificity of Starches in Relation to Genera, Species, etc.” Part 1, p. 292. Carnegie Institution of Washington, Washington, D. C. (1913).
2. Association of Official Agricultural Chemists. Official Methods of Analysis (9th ed.). The Association: Washington, D.C. (1960).
3. : In Methods in Enzymology, ed. by and , Vol. 3, p. 3. Academic Press, New York (1957).