Isotope Dilution Gas Chromatographic-Mass Spectrometric Method for the Determination of Unconjugated Lignans and Isoflavonoids in Human Feces, with Preliminary Results in Omnivorous and Vegetarian WomenHerman Adlercreutz, T. Hase, Kristiina Wähälä et al.|Analytical Biochemistry|1995Cited by 128