1. L. Andersson, 1994 .Effects of MCPA and tribenuron-methyl on seed production and seed size of annual weeds., Swed. J. Agric. Res, 24 :49 –56 .
2. Characteristics of seeds and seedlings from weeds treated with sublethal herbicide doses
3. Differential Competitive Ability of Winter Wheat Cultivars against Downy Brome
4. A. C. Bosnic, and C. J. Swanton .1997 .Economic decision rules for postemergence herbicide control of barnyardgrass (Echinochloa crus-galli) in corn (Zea mays)., Weed Sci, 45 :557 –56 .
5. U. Boström, 1994 .Guidelines reduce the use of herbicides., Växtskyddsnot, 58 :90 –93 .[In Swedish with English summary].