1. Breeding of Red-flowering Delphiniums using Inter specific Hybrids Produced by in Vitro Germination;Katoh;Breeding Science,2004
2. Blanché C. Revisió biosistemàtica del gènere Delphinium L. al a Península Ibèrica i a les Illes Balears. In: Institut d'Estudis Catalans, la Universidad de California, USA; 1991. p. 1-288.
3. Bhatnagar SS. The Wealth of India. CSIR: New Delhi, India; 1952. p. 1-30.
4. The shapes and sizes of seeds;Harper;Annu Rev Ecol Syst,1970
5. Baskin CC, Baskin JM. Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination. USA: Academic Press; 1998. p. 1-666.