Van Allan, J. A.; Reynolds, G. A.; Alessi, J. T.; Chie Chang, S.; C. Joines, R. (1971). “Reactions of 4‐pyrones with primary amines. A new class of ionic associates”. Journal of Heterocyclic Chemistry8 (6): 919–922. doi:10.1002/jhet.5570080606.
Cook, Denys (1963). “The Preparation, Properties, and Structure of 2,6-bis-(Alkyamino)-2,5-heptadien-4-ones”. Canadian Journal of Chemistry41 (6): 1435-1440. doi:10.1139/v63-195.
Franz Müller and Arnold P. Applebyki "Weed Control, 2. Individual Herbicides" in Ullmann's Encyclopedia of Industrial Chemistry 2010 doi:10.1002/14356007.o28_o01