Duan, L.-D., Y. Lin, and Q. Lin. “Neotypification of <i>Ophiorrhiza hunanica</I> H. S. Lo (Rubiaceae), A Species Endemic to Hunan, China”. Bangladesh Journal of Plant Taxonomy, vol. 21, no. 2, Dec. 2014, pp. 193-5, doi:10.3329/bjpt.v21i2.21360.