VOON, S. Y., L. D. NGAU, L. K. KHO, E. RUMPANG, H. VASANDER, J. JAUHIAINEN, K. YRJÄLÄ, H. SILVENNOINEN, and S. F. SIM. “Spatial Variability of Humification Degree in Tropical Peat of Oil Palm Plantations and Forests”. Borneo Journal of Resource Science and Technology, vol. 16, no. 1, June 2026, https://publisher.unimas.my/ojs/index.php/BJRST/article/view/11552.