4-pyron (Dutch Wikipedia)

Analysis of information sources in references of the Wikipedia article "4-pyron" in Dutch language version.

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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 Chemistry 8 (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 Chemistry 41 (6): 1435–1440. DOI: 10.1139/v63-195.