Aastveit, A. H. & Aastveit, K. (1990). Theory and application of open-pollination and polycross in forage grass breeding. Theoretical and Applied Genetics, 79, 618-624.
Abbasi, B. H., Saxena, P. K., Murch, S. J. & Liu, Ch. Z. (2007). Echinacea biotechnology: Challenges and opportunities. In Vitro Cellular & Developmental Biology – Plant, 43, 481-492.
AghaAlikhani, M., Iranpour, A. & Naghdi Badi, H. (2013). Changes in agronomical and phytochemical yield of purple coneflower (Echinaceae purpurea (L.) Moench) under urea and three biofertilizers application. Medicinal Plants Journal, 12(46), 121-136.
Annicchiarico, P. (2006). Diversity, genetic structure, distinctness and agronomic value of Italian lucerne (Medicago sativa L.). Euphytica, 148, 269-282.
Aynechi, Y. (1986). Pharmacogynosy and Medicinal Plants of Iran. University of Tehran Press.
(in Farsi)
Biesiada, A., Oszmianski, J. & Woloszczak, E. (2004). The effect of transplanting date on yield and quality of coneflower roots (Echinacea purpurea (L.) Moench.). Folia Universitatis Agriculturae Stetinensis, Agricultura, 95, 17-20.
Callan, N. W., Yokelson, T., Wall-Maclane, S., Westcott, M. P., Miller, J. B. & Ponder, G. (2005). Seasonal trends and plant density effects on cichoric acid in Echinacea purpurea (L.) Moench. Journal of Herbs, Spices & Medicinal Plants, 11, 35-46.
Caruso, T. J. & Gwaltney, J. M. (2005). Treatment of the common cold with Echinacea: a structured review. Clinical Infectious Diseases, 40, 807-810.
Choukan, R. (2008). Methods of genetical analysis of quantitative traits in plant breeding. Seed and Plant Improvement Institute. (in Farsi)
Dufault, R. J., Rushing, J., Hassell, R., Shepard, B. M., McCutcheon, G. & Ward, B. (2003). Influence of fertilizer on growth and marker compound of field-grown Echinacea species and feverfew. Scientia Horticulturae, 98, 61-69.
Estilai, A. B., Ehdaie, B., Naqvi, H. H., Dierig, D. A., Ray, D. T. & Thompson, A. E. (1992). Correlations and path analysis of agronomic traits in guayule. Crop Science, 32, 953-957.
Falster, D. S. & Westoby, M. (2003). Plant height and evolutionary games. Trends in Ecology and Evolution, 18(7), 337-343.
Fernandez, M. G. S., Becraft, P. W., Yin, Y. & Lubberstedt, T. (2009). From dwarves to giants? Plant height manipulation for biomass yield. Trends in Plant Science, 14(8), 454-461.
Hallauer, A. R. & Miranda, J. B. (1981). Quantitative genetics in maize breeding. Iowa State University Press, Ames, Iowa.
Hassell, R. L., Dufault, R. & Phillips, T. (2004). Relationship among seed size, source and temperature on germination of Echinacea angustifolia, pallida and purpurea. Acta Horticulturae, 629, 239-243.
Heldt, H. W. & Piechulla, B. (2010). Plant Biochemistry. Academic Press.
Ibrahim, O. E., Nuquist, W. E. & Axtell, J. D. (1985). Quantitative inheritance and correlations of agronomic and grain quality traits of sorghum. Crop Science, 25, 649-654.
Jung, Ch. & Muller, A. E. (2009). Flowering time control and applications in plant breeding. Trends in Plant Science, 14(10), 563-573.
Kreft, S. (2005). Cichoric acid content and biomass production of Echinacea purpurea plants cultivated in Slovenia. Pharmaceutical Biology, 43, 662-665.
Letchamo, W., Polydeonny, L. V., Gladisheva, N. O., Arnason, T. J., Livesey, J. & Awang, D. V. C. (2005). Factors Affecting Echinacea Quality. Trends in New Crops and New Uses, 514-521.
Lin-na, H. (2013). The morphological markers of Different phenotypes Echinacea purpurea. Journal of Applied Pharmaceutical Science, 3, 78-80.
Lothrop, J. E., Atkins, R. E. & Smith, O. S. (1985). Variability for yield and yield components in IAPIR grain sorghum random mating population II. Correlations, estimated gain from selection, and correlated responses to selection. Crop Science, 25, 240-244.
Nguyen, H. T. & Sleper, A. (1983). Theory and application of half-sib matings in forage breeding. Theoretical and Applied Genetics, 64, 187-196.
Omidbaigi, R. (2010). Production and Processing of Medicinal Plants (Vol. 1 & 4). Beh Nashr Press. (in Farsi)
Pank, F. (2007). Breeding of Medicinal Plants. In:. O. Kayser, & J. Quax (Eds.), Medicinal Plant Biotechnology, from basic research to industrial applications. (pp. 417-447.) John and Wiley.
Salami, H. & Ansari, V. (2009). The Role of Agriculture in Job Creation and Income Distribution: A path Decomposition Analysis. Iranian Journal of Agricultural Economics and Development, 40(3), 1-20. (in Farsi)
Stephens, L. C. (2008). Self-incompatibility in Echinacea purpurea. Hort Science, 43(5), 1350-1354.
Van Gaal, T., Galatowitsch, S. & Strefeler, M. (1998). Ecological consequences of hybridization between a wild species (Echinacea purpurea) and related cultivar (E. purpurea ‘White Swan’). Scientia Horticulturae, 76, 73-88.
Von Braun, J. & Virchow, D. (1996). Economic evaluation of biotechnology and plant diversity in developing countries. Plant Research and Development, 43, 50-61.
Weising, K., Nybon, H., Wolff, K. K. & Gunter, K. (2005). DNA Fingerprinting in Plants, Principle, Methods and Applications. (2nd ed.). CRC Press.
Wink, M. (2010). Biochemistry of Plant Secondary Metabolism (2nd ed.). Blackwell Publishing Ltd.
Yavari, A., Nazeri, V., Sefidkon, F. & Hassani, M. E. (2010). Influence of Some Environmental Factors on the Essential Oil Variability of Thymus migricus. Natural Product Communications, 5(6), 943-948.