X. M.  Wei, Cheng, J. K., Cheng, D. L., and Gao, L. M., ?Chemical constituents from Clinopodium urticifolium?, J Chin Chem Soc-Taip, vol. 51, pp. 1043?1049, 2004.

G.  Janicsak, Veres, K., Kakasy, A. Z., and Mathe, I., ?Study of the oleanolic and ursolic acid contents of some species of the Lamiaceae?, Biochem Syst Ecol, vol. 34, pp. 392?396, 2006.