Y. Maruyama, Y. Matsumoto, Y. Morikawa, L.H.Ang, and S.K Yap. 1997. “LEAF WATER RELATIONS OF SOME DIPTEROCARPS”. Journal of Tropical Forest Science (JTFS) 10 (2):249-55. https://jtfs.frim.gov.my/jtfs/article/view/1610.