1. Beijerinck, M. W., u. A. v. Delden: Zbl. Bakter. II, 9, 3. (1902).
2. Bergeys Manual of Determinative Bakteriology. Sixth Edition. (Board: Robert Breed, E. G. S. Murray and D. Parker-Hitchens). The Williams & Willkins Company. 1947.
3. Fischer, K. W.: Arch. f. Mikrob. 14, 385 (1950).
4. Gainy, P. L.: Z. angew. Chem. 40, 1060 (1927).
5. Gerlach u. Vogel: Zbl. Bakter. II, 8, 674 (1902).