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Medjakovic, S.; Jungbauer, A. (2008). «Red clover isoflavones biochanin A and formononetin are potent ligands of the human aryl hydrocarbon receptor». The Journal of Steroid Biochemistry and Molecular Biology108 (1–2): 171-177. PMID18060767. doi:10.1016/j.jsbmb.2007.10.001.