Julius, A., and M. Suleiman. “Preliminary Molecular Phylogeny of Bornean Plagiostachys (Zingiberaceae) Based on DNA Sequence Data of Internal Transcribed Spacer (ITS)”. Journal of Tropical Biology & Conservation (JTBC), vol. 4, Mar. 2016, doi:10.51200/jtbc.v4i.99.