1- Abdessatar O., and Fethia H.S. 2009. Biological behavior of Cyperus rotundus L. in relation to Agro- Ecological condations and ImposedHuman factors. The African Journal of Plant Science and Biotechnology 63-69.
2- Akin D.S., and Shaw D.R. 2001. Purple nutsedge (Cyperus rotundus L.) and yellow nutsedge (Cyperus esculentus) control in glyphosate- tolerant soybean (Glycine max). Weed Technology 15: 564-570.
3- Andrews F. W. 1940. A study of nut grass (Cyperus rotundus L.) in the cotton soil of the Gezira. I. The maintenance of life in the tuber. Annals of Botany (London), 4:177-193.
4- Azizi Zahan A.A., A.A Kamgar Haghighi., and A Sepaskhah. 2006. Effect of method and duration of irrigation on production of corm and flowering on saffron. Journal of Science and Technology Agriculture and Natural Research 10: 45-53. (In Persian with English Summary)
5- Berti A., Sattin M., Baldoni G., Del Pino A.M., Ferrero A., Monterro P., Tel F., Viggiani P., and Zanin G. 2008. Relationships between crop yield and weed time of emergence⁄ removal: modelling and parameter stability across environments. Weed Research 48: 378–388.
6- Couses R., Btain P., Odonovan J.T., and Osulilvan P.A. 1987. The use of biologically realistic wquation to describe the effect of weed density and relative time of emergence on crop yield weed Science 35: 720-725.
7- Das T.K., and Yaduraju N.T. 2008. Effect of soil solarization and crop husbandry practices on weed species competition and dynamics in soybean-wheat cropping system. Indian Journal of. Weed Science 40(1&2): 1-5.
8- Gilreath J.P., and Santos B.M. 2004. Herbicide dose and incorporation depth in combination with 1, 3-dichloropropene plus chloropicrin for Cyperus rotundus control in tomato and pepper. Crop Protection 23:205–210.
9- Gresta F., Lombardo G.M., Siracusa L., and Ruberto G. 2008. Saffron, an alternative crop for sustainable agricultural systema. A review. Agronomy for sustainable Development 28: 95-112.
10- Gresta F., Lombardo G.M., and Avola G. 2009. Saffron, sigmas production as affected by soil texture. 3th international symposium on Saffronan: forthcoming challenges in cultivation, research and economics.
11- Holm L.G., Plucknett D.L., Pancho J.V., and P Herberger J. 1991. The World’s Worst Weeds. Distribution and Biology. Malabar, FL: Krieger Publishing 125–133.
12- Horowitz M .1972. Growth, tuber formation and spread of Cyperus rotundus L. Weed Research 11:88-93.
13- Horowitz M. 1965. Data on the biology and chemical control of the nutsedge (Cyperus rotundus) in Israel. Int. J. Pest Manag. Part C, 11:389–414.
14- Jerry A., and Ivan Y. 1997. Effect of Rhizome Depth in Soil on Emergence and Growth of Field Mint (Mentha arvensis). Weed Technology 11: 149-151.
15- Jordan-Molero J.E., and Stoller E.W. 1978. Seasonal development of yellow and purple nutsedges (Cyperus esculentus and C. rotundus) in Illinois. Weed Science 26:614-618.
16- Justice O.L., and Whitehead M.D. 1946. Seed production, viability and dormancy in the nutgrass, Cyperus rotundus and C. esculentus. Journal of Agricaltural Research 73:303–318.
17- Khalighi A., Y Hojjati., M Babalar., and R Naderi. 2006. Effects of cytocinin nutrient treatment and soil texture on quality and quantity charactristic of onion and scallion in Darwin hybrid tuplip, Apeldroorn figure. Agronomy Journal in Agriculture and Gardening 73:58-64. (In Persian with English summary).
18- Klimeš L., Klimešova J., and Osbornova J. 1993. Regeneration capacity and carbohydrate reserves in a clonal plant Rumex alpinus: effect of burial. Vegetatio 109:153–160
19- Nelson K.A., and Renner K.A. 2002. Yellow nutsedge (Cyperus esculentus) control and tuber production with glyphosate and ALS inhibiting herbicides. Weed Technol 16: 512-519.
20- Siriwardana G., and Nishimoto R.K. 1987. Propagules of purple nutsedge (Crperus rotundus) in soil. Weed Technology 1:217-220.
21- Wearingen J. 2004.WeedUS: Database of Invasive Plants of Natural Areas in the U.S. (In progress).http://www.nps.gov/plants/alien.
22- Webester R.D., and Benedixen L.E. 1987. Year- round management of yellow nutsedge (Cyperus esculentus) with or without polyethylene mulch. Weed Science 53:839-845.