de Candolle, A.P. 1828: Prodromus Systematis Naturalis Regni Vegetabilis. Vol. 3. Treuttel et Würtz, Paris.
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.
Sweet, R. 1830: Sweet's Hortus Britannicus: or, A catalogue of all the plants indigenous or cultivated in the gardens of Great Britain. Edition 2. James Ridgeway, London.