1. Bajaj, Y.P.S., 1990.In vitro production of haploids and their use in cell genetics and plant breeding. In: Y.P.S. Bajaj (Ed.), Biotechnology in Agriculture and Forestry, Vol. 12: Haploids in Crop Improvement, Part I, pp. 1–44. Springer-Verlag, Berlin.
2. Blakeslee, A.F., J. Belling, M.E. Farnham & A.D. Bergner, 1922. A haploid mutant in the Jimson weed,Datura stramonium. Science 55: 646–647.
3. Blakeslee, A.F. & J. Belling, 1924. Chromosomal mutations in the Jimson weed,Datura stramonium. J. Hered. 15: 195–206.
4. Bouvier, L., Y.X., Zhang & Y. Lespinasse, 1993. Two methods of haploidization in pear,Pyrus communis L.: greenhouse seedling selection andin situ parthenogenesis induced by irradiated pollen. Theor. Appl. Genet. 87: 229–232.
5. Cameron, J.W. & H.B. Frost, 1968. Genetic, breeding and nucellar embryony. In: W. Reuther, L.D. Batchelor & H.J. Webber (Eds.), The Citrus Industry, Vol. 2., pp. 325–370. Div. Agr. Sci., Univ. Calif., Berkeley.