Composition of the essential oil from Achillea millefolium L. from EstoniaOrav, Anne; Kailas, Tiiu; Ivask, KaireJournal of essential oil research2001 / p. 290-294

Composition of the essential oil from wild majoram (Origanum vulgare L.ssp.vulgare) of different originsIvask, Kaire; Orav, Anne; Kailas, Tiiu; Raal, Ain; Arak, Elmar; Paaver, UrveJournal of essential oil research2005 / 4, p. 384-387

Composition of the essential oil of Levisticum officinale W.D.J. Koch from some European countriesRaal, Ain; Arak, Elmar; Orav, Anne; Kailas, Tiiu; Müürisepp, Aleksander-MatiJournal of essential oil research2008 / p. 318-322

Composition of the oil and supercritical fluid CO2 extract of sweet gale (Myrica gale L.) fruitsSokolova, Maia; Orav, Anne; Koel, Mihkel; Kailas, Tiiu; Müürisepp, Aleksander-MatiJournal of essential oil research2005 / March/April, p. 188-191 : ill https://www.tandfonline.com/doi/abs/10.1080/10412905.2005.9698871

Variation in the composition of the essential oil of commercial Valeriana officinalis L. roots from different countriesRaal, Ain; Arak, Elmar; Orav, Anne; Kailas, Tiiu; Müürisepp, Aleksander-MatiJournal of essential oil research2008 / 6, p. 524-529 https://www.researchgate.net/publication/241714499_Variation_in_the_Composition_of_the_Essential_Oil_of_Commercial_Valeriana_Officinalis_L_Roots_from_Different_Countries

Volatile constituents of Matricaria matricaroidesOrav, Anne; Kailas, Tiiu; Kann, JüriJournal of essential oil research1999 / p. 243-245