1. Arvouet-Grand, A., Vennat, B., Pourrat, A., Legret, P. 1994. Standardisation d`un extrait de propolis et identification des principaux constituants. J. de Pharmacie de Belgique, 49: 462-468.
2. Assimopoulou, A.N., Papageorgiou, V.P. 2005. Radical scavenging activity of Alkanna tinctoria root extracts and their main constituents hydroxynaphthoquinones. Phytother Res., 19:141–147.
3. Assimopoulou, A.N., Karapanagiotis, I., Vasiliou A., Kokkini, S., Papageorgiou, V.P. 2006. Analysis of alkannin derivatives from Alkanna species by high-performance liquid chromatography/photodiode array/mass spectrometry. Bıomedıcal Chromatography, 20: 1359–1374.
4. Bageri, S., Sanjarian, F., Haghbeen, K., Ebrahimi, M.A. 2011. Establıshment Of Cell Suspensıon Culture From Onosma Dasytrıchum Seed Callus Culture. International Research Journal of Applied and Basic Sciences, 2 (10): 392-397.
5. Chang, M.J., Huang, G.J., Ho, Y.L., Lin, I.H., Huang, S.S., Chang, T.N., Chang, H.Y., Chang, Y.S. 2008. Study on the antioxidant activities of crude extracts from the roots of Arnebia euchroma and Lithospermum erythrorhizon, Mid-Taiwan J. Med., 13: 113-121.