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CHAMBERS, R. D., HUTCHINSON, J., BATSANOV, A. S., LEHMANN, C. W., & NAUMOV, D. Y. (2010). ChemInform Abstract: Elemental Fluorine. Part 6. Fluorination of Cyclic 1,3-Diketones and Related Compounds. ChemInform, 28(11), no–no. doi:10.1002/chin.199711054 
10.1002/chin.199711054