1. Anonymous, 2009. Monthly Statistics of Foreign Trade of India, Exports including Re-exports, Ministry of Commerce and Industry. Directorate General of Commercial Intelligence and Statistics, Kolkata, India.
2. Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination;Baskin,2001
3. Seeds: Physiology of Development and Germination;Bewley,1994
4. Germination and dormancy of Arthropodium cirratum seeds;Conner;New Zeal. Nat. Sci.,1988
5. Germination value: an index combining speed and completeness of pine seed germination;Czabator;For. Sci.,1962