Frans Antonie Stafleu et Richard S. Cowan, Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types, vol. Vol. 5, Utrecht, 2nd, (DOI10.5962/bhl.title.48631, lire en ligne), p. 895.
books.google.com
(en) A. C. Brown, A History of Scientific Endeavour in South Africa : A Collection of Essays Published on the Occasion of the Centenary of the Royal Society of South Africa, Royal Society of South Africa, (lire en ligne), p. 249.
(en) Mary Gunn et L. E. W. Codd, Botanical exploration of southern Africa : introductory volume to the Flora of southern Africa, Cape Town, A. A. Balkema, , 400 p. (ISBN0-86961-129-1, lire en ligne), p. 334–335
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dx.doi.org
Frans Antonie Stafleu et Richard S. Cowan, Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types, vol. Vol. 5, Utrecht, 2nd, (DOI10.5962/bhl.title.48631, lire en ligne), p. 895.