Siebert, S. ., Struwig, M. ., Knoetze, L. . and Komape, D. M. . (2018) “Celtis sinensis Pers. (Ulmaceae) naturalised in northern South Africa and keys to distinguish between Celtis species commonly cultivated in urban environments”, Bothalia, African Biodiversity & Conservation, 48(1). doi: 10.4102/abc.v48i1.2288.