ADAS consulting Ltd. 2002. Calendula as Agronomic Raw Material for Industrial Application (CARMINA). (Final Project Report). ADAS Terrington, King’s Lynn, Norfolk, 50 pp.
Aroiee, H., Kashi, A., and Omidbaigi, R. 2000. Effects of salinity and nitrogen nutrition on free-proline and oil content of common pumpkin. Seed and Plant 16(3): 359-373.
Baghdadi, H. 2003. Evaluation of planting date and density on seed yield of pumpkin. In Second Congress on Medicinal Plants, Tehran, Iran 68 pp. (In Persian with English Summary)
Barkhi, A., Rashed-Mohassel, M., Nassiri-Mahallati, M., Hosseini, S., and Moazzen, S. 2009. Effect of planting pattern and plant density on growth, yield and yield components of maize (Zea mays L.) in competition with redroot pigweed (Amaranthus retrofelexus). Iranian Journal of Crop Sciences 11: 67-81. (In Persian with English Summary)
Dodman, A., Shiranirad, A.H., and Naghvi, M. 2010. Effect of planting date and density plant on yield and oil percentage in (Cucurbita pepo L.). In: Eleventh Iranian Crop Science Congress. Environmental Sciences Research Institute, Shahid Beheshti University, Tehran, Iran p. 24–26.
Ebadi, A., Gholipour, A.G., and Nikkhah Bahrami, R. 2008. Effect of bead pruning and between row spacing on yield and yield components of pumpkin (Cucurbita pepo L.). Pajouhesh-va-Sazandegi 78: 41-47. (In Persian with English Summary)
Evans, G.C. 1972. The quantitative analysis of plant growth. University of California Press. ISBN, 0-520-02204-
Ghanbari, A., Nadjafi, F., and Shabahang, J. 2007. Effects of irrigation regimes and row arrangement on yield, yield components and seed quality of pumpkin (Cucurbita pepo L.). Asian Journal of Plant Sciences 6(7): 1072- 1079.
Gholipouri, A., and Nazarnejad, H. 2007. The effect of stem pruning and nitrogen levels on some physiochemical characteristics of pumpkin seed. Pakistan Journal of Biological Sciences 10(20): 3726-3729.
Hadley, P., Summerfield, R., and Roberts, E. 1983. Effects of temperature and photoperiod on reproductive development of selected grain legume crops. Temperate legumes: The physiology, genetics and nodulation. Davies, DR, p. 19-41.
Labbafi, M., Allahdadi, I., Akbari, G., Najafi, F., KhalAaj, H., and Mehrafarin, A. 2012. Quality/Quantity changes in oil and morphological traits of medicinal pumpkin (Cucurbita pepo L.) under different cultivation practices. Journal of Medicinal Plants 11: 212-220. (In Persian with English Summary)
Melissa, W.A.L., Allison, R., Kenneth, R.J., and Barbara, Z.A. 2008. The effects of repeated planting, planting density and specific transfer pathways on PCB uptake by Cucurbita pepo grown in field conditions. Science of the Total Environment 405 (1-3): 14-25.
Moazzen, S.H., Daneshian, J., Valadabad, S.A., and Baghdadi, H. 2006. Study of plant and phosphate fertilization on some agronomic characters and seed and fruit yield of pumpkin (Cucurbita pepo L.). Iranian Journal of Medicinal and Aromatic Plants 22(4): 397-409. (In Persian with English Summary)
Moradi Marjaneh, E. 2012. Quantitative analyses of growth and development of Cucurbita pepo L. in response to plant density and nitrogen fertilizer. MSc Thesis, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran. (In Persian with English Summary)
Nerson, H. 2005. Effects of fruit shape and plant density on seed yield and quality of squash. Scientia Horticulturae 105(3): 293-304.
Parkash, S., Jamwal, R., and Thakur, D. 1994. Response of field pumpkin (Cucurbita pepo) to sowing date and plant spacing. Indian Journal of Agronomy 39(3): 488-488.
Rahnama, A. 2007. Plant Physiology. Puran Research Publications, Tehran, Iran. 143 pp. ISBN, 978-964-2547-95-1. (In Persian)
Sandhu, P. 1984. Effect of sowing dates, phosphorus, levels and herbicides on the response of Rhizobium inoculation in lentil. Lens Newsletter 11: 35.
Shabahang, J., Khorramdel, S., Asadi, G., meerabai, A., and Nemati, H. 2010. Effect of row spacing and row spacing on yield components, seed yield and Pumpkin oil (Cucurbita pepo L.). Journal of Agroecology 2(3): 417-427. (In Persian with English Summary)
Sharma, R. 2004. Agro-Techniques of Medicinal Plants: Daya Publishing House, Delhi, 264 pp.
Thomas, D., Breve, M., Raymer, P., Dasilva, J. 1990. Planting date effect and double-cropping potential of rape in the southeastern United States. Applied Agricultural Research 5: 205-211.
Zhang, X. 1998. Regulatory Situation of Herbal Medicines A worldwide Review. World Health Organization 26.