1. Aamlid, K., 1952. A study of cauliflower (Brassica oleracea
Linn. var. botrytis D.C.) Ph.D. Thesis, Univ. of Maryland, College Park, Maryland, U.S.A.
2. Garner, R. J., 1958. The Grafter's handbook. London: Faber.
3. Haine, K. E., 1951. Vegetative propagation from the broccoli curd after suppression of flowering. Nature, Lond. 168: 919–920.
4. Honma, S., M. J. Bukovac and O. Heeckt, 1961. Studies on the asexual reproduction of cauliflower. Proc. Amer. Soc. Hort. Sci. 78: 343–348.
5. Nieuwhof, M., 1958. Vegetative maintenance and propagation of cauliflower. Euphytica 7: 170–178.