1- AOCS: Official Methods and Recommended Practices of the American Oil Chemists Society. 1993. AOCS Press, Champaign, II. (USA).
2- Arganosa G.C., Sosuskli F.W. and SlikardA.E. 1998. Seed yield and essential oil of biennial caraway grown in Western Canada. Journal of Herbs, Spices and Medicinal Plants, 1(9): 9-17.
3- Alikamar R. 2004. Density of cumin and chickpea intercropping with emphasis on weed control in Mashhad. Ferdowsi University of Mashhad, Mashhad. Iran. (In Persian with English Summary).
4- Beheshti A. 1995. Effect of different planting density on yield and yield components of grain sorghum and soybean in mixed cropping system.Ferdowsi University of Mashhad, Mashhad. Iran. (In Persian with English Summary).
5- Carrubba A., Torre R. and MatrangaA. 2008. Cultivation trials of some aromatic and medicinal plants in asemi-arid mediterranean environment. Proceedings of an International Conference on MAP, ActaHorticulture(ISHS).
6- Gliessman S. R. 1997. Agroecology: Ecological Process in Sustainable Agriculture. Arbor Press. 357p.
7- Gheshm R. and Tajbakhsh A. M. 2001.The effect of planting density on corn and soybeans and corn Heading on yield components and yield,competition and production ecological on the intercropping. Agricultural Sciences and Technology Journal, 15(2): 65-73
8- Iftikhar hussain B., Ahmad R., Jabbar A., Nazir M. S. and Mahmood T. 2006 Competitive behaviour of component crops in different sesame-legume Intercropping Systems. International Journal of Agriculture & Biology 2:165-167.
9- Francis C.A. 1986. Biological efficiencies in multiple cropping systems. Advances in Agronomy Journal42: 1-41.
10- Jackson L.E., Pascual U. and Hodgkin T. 2007. Utilizing and conserving agrobiodiversity in agricultural landscapes. Agronomy Ecosystem Environment, 121: 196-210.
11- Jahani M., Koocheki A., Nassiri Mahallati M., 2008. Comparison of different intercropping arrangements of cumin (Cuminum cyminum L.) and lentil (Lens culinaris M.). Iranian Journal of Field Crops Research, 6: 67-78.(In Persian with English Summary(
12- Javanshir A., Dabbagh Mohammadi Nasab A., Hamidi A., and Gholipour C. (Eds.), 2000. The ecology of intercropping (translation). Jihad, Mashhad University Press.
13- Jahan M. 2004. Examine the ecological aspects of cultivation, manure mixed with chamomile and calendula Agronomy. Ferdowsi University of Mashhad, Mashhad. Iran. (In Persian with English Summary).
14- Jahan M., Koocheki A., and Nassiri. Mahallati. M. 2008.Investigate various combinations of intercropping of lentil and cumin in low input agricultural systems. Iranian journal of field crop research, 6:67-78
15- Haggaard H., Ambus P. and Jensen E. S. 2001. Interspecific competition, N use and interference with weeds in pea barley intercropping. Field Crop Research 70: 101-109.
16- Hasanzade F. 2007. The effect of density on yield and agronomic characteristics of savory and persian clover intercropping. Ferdowsi University of Mashhad, Mashhad. Iran. (In Persian with English Summary).
17- Koocheki A., Nassiri Mahallati M., Khorramdel S., Anvarkhah S., Sabt Teimouri M. and Sanjani S. 2010. Evaluation of growth indices of hemp (Cannabis sativa L.) and sesame (Sesamum indicum L.) in intercropping with replacement and additive series. Journal of Agricultural Ecology, 2:30-40.
18- Koocheki A., Nakh Forosh A. and Zarif ketabi K. 1997. Organic Agriculture. Ferdowsi University of Mashhad press.
19- Kombiok J. M., Buah S. S. J. and Dzomeku K. 2012. Rice influence on grain yield of maize in maize/rice mixture in the Northern Guinea Savanna zone of Ghana .Journal of Crop Improvement, 26(1): 87-100.
20- Maffei M. and Mucciarelli M. 2003. Essential oil yield in peppermint/soybean strip intercropping. Field Crop Research, 84: 229-240.
21- Mahale M.M., Nevase T. and Chavan P.G. 2008. Yield of sesame (Sesamum indicum) and groundnut (Arachis hypogaea) as influenced by different intercropping ratios and sulphur levels Legume Research, 31:268-271
22- Mirhashemi S.M., Koocheki A., Parsa M. and Nassiri Mahallati, M. 2010. Evaluation of growth indices of ajowan and fenugreek in pure culture and intercropping based on organic agriculture. Iranian Journal of Field Crops Research, 7: 685-694. (In Persian with English Summary).
23- Olowe v.I.O. and Adeyemo A.Y. 2009. Enhanced crop productivity and compatibility through intercropping of sesame and sunflower varieties. Annals of Applied Biology, 155:285–291
24- Pelzer E., Bazot M. and Makowski D. 2012. Pea–wheat intercrops in low-input conditions combine high economic performances and low environmental impacts. European Journal of Agronomy, 40: 39-53.
25- Pour. Amir. F., Nassiri. Mahallati. M., Koocheki. A. and Ghorbani. R. 2010. The effect of different combinations of croping on yield and yield components of sesame and pea intercropping on incremental series. Iranian journal of field crop research, 8(3): 339-402
26- Sasatawa B.M., Lawan M. and Maina Y.T. 2004. Management of insect pests of soybean: effects of sowing date and intercropping on damage and grain yield in the Nigerian Sudan savanna. Crop Protection, 23: 155-161.
27- Sujatha S., Bhat R., Kannan C. and Balasimha D. 2011. Impact of intercropping of medicinal and aromatic plants with organic farming approach on resource use efficiency in arecanut (Areca catechu L.) plantation in India IndustrialCrops and Products,33(1): 78-83.
28- Tripathi S. and Dwivedi A. K. 2009. Economics of intercropping fennel with cauliflower. Annals of Horticulture, 2(1): 32-37.