1. J.-M. Tison and B. de Foucault "Flora gallica. Flore de France." , (2014)
2. S. Pignatti, "Flora d'Italia." , (1982)
3. J. R. Allison and T. E. Stevens "Castanea." 66, "Vascular flora of Ketona dolomite outcrops in Bibb County, Alabama." 154 (2001)
4. et al. "African Plant Database (version 3.4.0). Cyperus alternifolius subsp. flabelliformis Kük., Lavandula angustifolia Mill., Lavandula dentata L., Melilotus officinalis (L.) Pall., Nicotiana alata Link & Otto, Rumex obtusifolius L. subsp. obtusifolius, Salvia microphylla Kunth, Schinus L. – Genève: Conservatoire et Jardin botaniques." , (2019)
5. P. W. Ball, "Flora europaea 2.Rosaceae to Umbelliferae." , "Staphylea L." 242 (1968)