J. F.  Veldkamp, ?Setaria clivalis (Ridl.)Veld., comb.nov. (Gramineae)?, Miscellaneous Papers Landbouwhogeschool Wageningen, vol. 19, pp. 315-320, 1980.

P.  Goetghebeur and Van der Veken, P., ?Studies in Poaceae 2. A new species of Digitaria section Calvulae, and a reexamination of Digitariopsis sections Flaccidulae and Monodactylae?, Miscellaneous Papers Landbouwhogeschool Wageningen, vol. 19, pp. 145-153, 1980.