1. Anonymous, Missouri Farm Facts, Missouri Agricultural Statistics Services, 2002, p. 71
2. J.T. Beyers, Influence of light on glufosinate efficacy, M.S. Thesis, University of Missouri, Columbia, 1999, pp. 26–82
3. Circadian response of annual weeds to glyphosate and glufosinate;Martinson;Chronobiol. Int.,2002
4. Effectiveness of bentazon applied at various times of the day;Doran;Weed Sci.,1976
5. Effect of time of day of application upon efficacy of chlorimuron ethyl and fomesafen;Miller;Proc. North Cent. Weed Sci. Soc.,2000