R. C. K Chung (2022) “TAXONOMIC NOTES ON THE BORNEAN <em>HELICIA</em> AND <em>HELICIOPSIS</em> (PROTEACEAE)”, Journal of Tropical Forest Science (JTFS) , 13(3), pp. 534–547. Available at: https://jtfs.frim.gov.my/jtfs/article/view/1371 (Accessed: 7 May 2024).