F. Wen, W. Li, B. Zhao, G.-Y. Liang, and Y.-G. Wei, “<i>Primulina purpurea</i> F. Wen, B. Zhao & Y.G Wei (Gesneriaceae), a new species from China”, Bangladesh J. Plant Taxon, vol. 19, no. 2, pp. 167–172, Dec. 2012.