Gibby, Mary, and David J. Middleton. “Flora of Peninsular Malaysia, Series I: Ferns and Lycophytes, Volume 1 (Malayan Forest Records No. 48) . B. S. Parris, R. Kiew, R. C. K. Chung, L. G. Saw & E. Soepadmo (eds). Flora of Peninsular Malaysia, Series II: Seed Plants, Volume ”. Edinburgh Journal of Botany, vol. 68, no. 2, June 2011, pp. 328-30, https://doi.org/10.1017/S0960428611000187.