1. Bayliss, M.W., 1976. Variation of cell cycle duration within suspension cultures ofDaucus carota and its consequence for the induction of ploidy changes with colchicine. Protoplasma 88: 279–285.
2. Broertjes, C., 1974. Production of polyploids by the adventitious bud technique. In: Polyploid and Induced Mutations in Plant Breeding, pp. 29–34. I.A.E.A., Vienna, -PL-503/6.
3. Cateland, B. & A. Lambert, 1973. L’androgenèsein vitro par culture d’anthèresd’Asparagus officinalis. H. Les problèmes de polyploïdie. In: L. Thevenin (Ed.), 4ème Réunion sur la Section de l’Asperge, pp. 183–189. Eucarpia Sect. Horticole, Versailles.
4. Chang, D.C.N. & K.H. Peng, 1993. Ancymidol, phloroglucinol and tryptone enhancedin vitro rooting of asparagus nodal sections. In: 8th Intl. Symp. Abstract, Palmerston North, Nov. 21–26, 1993, p. 59.
5. Chen, C.H. & Y.G. Kallemeyn, 1979. In vitro induction of tetraploid plants from colchicine-treated diploid daylily callus. Euphytica 28 : 705–709.