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Nasipuri, D.; Mitra, K.; Venkataraman, S. Cyclohexenone derivatives. Part VI. C-3 and C-1 alkylation of Hagemann's ester (Ethyl 2-methyl-4-oxocyclohex-2-enecarboxylate) with alkyl halides and Michael acceptors. Journal of the Chemical Society, Perkin Transactions 1. 1972: 1836. doi:10.1039/P19720001836.
Begbie, A. L.; Golding, B. T. A new synthesis of ethyl 2-methyl-4-oxocyclohex-2-enecarboxylate (Hagemann's ester) and its methyl and t-butyl analogues. Journal of the Chemical Society, Perkin Transactions 1. 1972: 602. doi:10.1039/P19720000602.
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Hogg, John A. Synthetic Sterols. I. Model Experiments Employing Hagemann's Ester. Journal of the American Chemical Society. 1948, 70 (1): 161–164. PMID 18918810. doi:10.1021/ja01181a047.
