1. Katzer, G. (2001).Mahleb, _http://www-ang.kfunigraz.ac.atlkatzer/eng/prun-mahhtm/.
2. Hortus, T. (1976).A concise Dictionary of Plants Cultivated in the United States and Canada, Macmillan, NY, p. 920.
3. Pitarevic, I., Kustrak, D., Kuftinec, J. and Blazevic, N. (1985).Influence of ecological factors on the content and composition of the essential oil inSalvia officinalis. In: Proceedings of the 15th International Symposium on Essential Oils, Svendsen, A.B. and Scheffer, J.J.C. (eds.). Martinus Nijhoff/Dr W. Junk Publishers, Boston, 199–202.
4. Verzar-Petri, G., Then, M. and Meszaros, S. (1985).Formation of essential oil in Clary sage under different conditions. In: Proceedings of the 15th International Symposium on Essential Oils. Svendsen, A.B. and Scheffer, J.J.C. (eds.). Martinus Nijhoff/Dr W. Junk Publishers, Boston, 19–21.