1. V. K. Lavrenov and G. V. Lavrenov, A Complete Encyclopedia of Medicinal Plants [in Russian], St. Petersburg, Olma-Press, Moscow (1999) Vol. 2, Neva.
2. Yu. Nuraliev, Medicinal Plants [in Russian], IKPA, Nizhnyi Novgorod (1991).
3. A. N. Kupriyanov, What Grows in the Garden [in Russian], Barnaul (1998).
4. Plant Resources of Russia and Neighboring States [in Russian], Mir i Sem'ya, St. Petersburg (1996), Part I, the Lycopodiaceae-Ephedraceae families, Part II, Suppl. to vol. 1–7.
5. Edible Medicinal Plants of the Caucasus [in Russian], Rostov University Press, Rostov-on Don (1989).