1. Koshelev, Yu.A. and Ageeva, L.D., Oblepikha (Sea Buckthorn), Biisk, 2004.
2. Kukina, T.P., Demenkova, L.I., Raldugin, V.A., Maksimov, B.I., Chizhov, O.S., Veselovskii, V.V., and Moiseenkov, A.M., Sea buckthorn leaf polyprenols and dolichols, Sib. Khim. Zh., 1991, no. 6, pp. 89–93.
3. Kukina, T.P. and Raldugin, V.A., Maslinic and 2α-hydroxyursolic acids from sea buckthorn leaves, Sib. Khim. Zh., 1992, no. 2, pp. 92–93.
4. Liu, J., Pharmacology of oleanolic acid and ursolic acid, J. Ethnopharmacol., 1995, vol. 49, pp. 57–68.
5. Hussain, H., Green, I.R., Ali, I., Khan, I.A., Ali, Z., Al-Sadi, A.V., and Ahmed, I., Ursolic acid derivatives for pharmaceutical use: A patent review (2012–2016), Expert Opin. Ther. Pat., 2017, vol. 27, no. 9, pp. 1061–1072.