1. Holm LG, Plucknett DL, Pancho JV, Herberger JP (1991) The World’s Worst Weeds. Distribution and Biology. Honolulu, HI: University of Hawaii Press. 430–435.
2. Wuolo A, and Jönsson B (2002) Nattskatta är ett problemogäs. Potatis Grönsaker Nr4.
3. Grapevine row orientation affects light environment, growth, and development of black nightshade (Solanum nigrum);A Shrestha;Weed Sci,2005
4. Weed Flora Distribution in Greek Cotton Fields and Its Possible Influence by Herbicides;G Economou;Weed Sci,2005
5. Influence of Pyrithiobac Application Rate and Timing on Weed Control and Cotton Yield in Greece;NS Kaloumenos;Weed Technol,2005