1. Josifovic, M. 1974.The Flora of FR Serbia., Vol. Tome VI, 425–429. Belgrade: Serbian Academy of Sciences and Arts, Department of Natural and Mathematical Sciences.
2. Gamier, G., Bezanger-Beauquesne, L. and Debraux, G. 1961.Ressources médicinales de la Flore française, Vol. Tome II, 1229–1230. Paris: Vigot Frères Éditeurs.