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- A rapid tandem mass spectrometric assay for determination of ursolic acid - Application to analysis of ursolic acid in four species of Staphylea L. and leaves of Staphylea pinnata L. gathered during ontogenesis / Laciková, Ľ. ... [et al.] . Chromatographia . - Vol. 63 (2006), s. 117-122 [Dokument nie je vo fonde knižnice]