, a new genus of Vernonieae from East Africa (Asteraceae)DOI: info:10.3897/phytokeys.25.5556v. 25No. 247–53
Robinson, Harold E. and Skvarla, John J. 2013. "Lettowia, a new genus of Vernonieae from East Africa (Asteraceae)." PhytoKeys, 25, (2) 47–53. https://doi.org/10.3897/phytokeys.25.5556.