1. Allison, A. C.: Protection Afforded by Sickle-cell Trait Against Subtertian Malarial Infection. Brit. Med. J. 1954, 290.
2. Avery, O. T. C., M. McLeod and M. McCarty: Studies on the Nature of the Substance Inducing Transformation of Pneumococcal Types: Induction of Transformation by a Desoxyribonucleic Acid Fraction Isolated from Pneumococcus Type III. J. exp. Medicine 79, 137 (1944).
3. Beadle, G. W.: Some Recent Developments in Chemical Genetics. Fortschr. Chem. organ. Naturstoffe 5, 300 (1948).
4. Bonner, D. M.: Gene-enzyme Relationships in Neurospora. Cold Spring Harbor Sympos. Quant. Biol. 16, 143 (1951).
5. Catcheside, D. E.: The Genetics of Microorganisms, p. 223. London: Pitman Publ. Corp. 1951.