STAFLEU, Frans A.; COWAN, Richard S. Taxonomic literature: a selective guide to botanical publications and collections with dates, commentaries and types. Utrecht: Bohn, Scheltema & Holkema, 1976. Dostupné online. ISBN9789031302246. (anglicky)
ipni.org
C.A.Sm. – Christo Albertyn Smith (1898-1956) [online]. International Plant Names Index [cit. 2021-10-25]. Dostupné online. (anglicky)
librarything.com
Famous People & Personalities [online]. LibraryThing, 24. 12. 1999. „Institute legend has it that the editing had to be quite severe, as otherwise it would have made history as the only government publication ever to be banned by the same government, on account of the salty names of many South African plants.“. Dostupné online. (anglicky)