1. Buiatti, M., R. Ragazzini andF. D'amato: Somatic mutations in the carnation induced by gamma radiation. In: The use of induced mutations in plant breeding p. 719?723. Rome: FAO-IAEA, 1965.
2. Halevy, A. H., andS. H. Wittwer: Prolonging cut flower life by treatment with growth retardants B-Nine and CCC. Flor. Rev.136, 39?40 (1965).
3. Imai: The genes for double flowers in the commercial varieties of perpetum carnations (Jap.). Genetics14, 63?65 (1938).
4. Knapperberger, R. L., andW. D. Holley: Tests with cut flower preservatives Colo. Flower Grower's Assoc. Bull.63, 23 (1955).
5. Klougart, A.: Essais sur la conservation des fleurs coupées. Rev. Hort. Suisse40, 378?384 (1967).