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Mirjalili, M.H.; Salehi, P.; Badi, H.N.; Sonboli, A., Volatile constituents of the flowerheads of three Echinacea species cultivated in Iran, Flavour Fragr. J., 2006, 21, 2, 355-358, https://doi.org/10.1002/ffj.1657 . [all data]