Muthyala, Rajeev S; Ju, Young H; Sheng, Shubin; Williams, Lee D; Doerge, Daniel R; Katzenellenbogen, Benita S; Helferich, William G; Katzenellenbogen, John A (2004). “Equol, a natural estrogenic metabolite from soy isoflavones”. 《Bioorganic & Medicinal Chemistry》 12 (6): 1559–1567. doi:10.1016/j.bmc.2003.11.035. ISSN0968-0896. PMID15018930.
Frankenfeld CL, Atkinson C, Thomas WK, 외. (December 2005). “High concordance of daidzein-metabolizing phenotypes in individuals measured 1 to 3 years apart”. 《Br. J. Nutr.》 94 (6): 873–6. doi:10.1079/bjn20051565. PMID16351761.
Muthyala, Rajeev S; Ju, Young H; Sheng, Shubin; Williams, Lee D; Doerge, Daniel R; Katzenellenbogen, Benita S; Helferich, William G; Katzenellenbogen, John A (2004). “Equol, a natural estrogenic metabolite from soy isoflavones”. 《Bioorganic & Medicinal Chemistry》 12 (6): 1559–1567. doi:10.1016/j.bmc.2003.11.035. ISSN0968-0896. PMID15018930.
Frankenfeld CL, Atkinson C, Thomas WK, 외. (December 2005). “High concordance of daidzein-metabolizing phenotypes in individuals measured 1 to 3 years apart”. 《Br. J. Nutr.》 94 (6): 873–6. doi:10.1079/bjn20051565. PMID16351761.