Alan, Sevim, et al. “Composition of Essential Oils of Calamintha Nepeta (L.) Savi Subsp. Nepeta and Calamintha Nepeta (L.) Savi Subsp. Glandulosa (Req.) P.W. Ball”. Asian Journal of Chemistry, vol. 23, no. 6, Mar. 2011, pp. 2357-60, https://asianpubs.org/index.php/ajchem/article/view/10399.