Key points are not available for this paper at this time.
Donovan, D. T. and R. Puri 2004. Learning from traditional knowledge of non-timber forest products: penan benalui and the autecology of aquilaria in indonesian borneo. Ecology and Society 9(3): 3. https://doi.org/10.5751/ES-00678-090303
Donovan et al. (Thu,) studied this question.