Zhang Z, Qikui Wu, Ying Luo, Xiaojun Wang, and Fangyuan Yu. “FOLIAR POTASSIUM FERTILISER HELPS TO INCREASE KERNEL OIL CONTENT IN <em>STYRAX TONKINENSIS</Em>, A NON FOOD FEEDSTOCK”. Journal of Tropical Forest Science (JTFS), vol. 33, no. 3, Aug. 2021, pp. 261-73, https://jtfs.frim.gov.my/jtfs/article/view/54.