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Essential oil content and composition in commercial Achillea millefolium L. herbs from different countriesRaal, Ain; Orav, Anne; Arak, ElmarJournal of essential oil bearing plants2012 / p. 22-31 https://www.academia.edu/56949794/Essential_Oil_Content_and_Composition_in_Commercial_Achillea_millefolium_L_Herbs_from_Different_Countries

Phytochemical analysis of the essential oil of Achillea millefolium L. from various European countriesOrav, Anne; Arak, Elmar; Raal, AinNatural product research2006 / 12, p. 1082-1088