| Food additives | flavoring | | Leung, A. Y. & S. Foster. 1996. Encyclopedia of common natural ingredients used in food, drugs, and cosmetics, ed. 2 |
| Human food | beverage base | | Kunkel, G. 1984. Plants for human consumption |
| Human food | beverage base | | Leung, A. Y. & S. Foster. 1996. Encyclopedia of common natural ingredients used in food, drugs, and cosmetics, ed. 2 |
| Human food | beverage base | | Vossen, H. A. M. van der & M. Wessel, eds. 2000. Stimulants. In: Faridah Hanum, I. & L. J. G. van der Maesen, eds., Plant Resources of South-East Asia (PROSEA) 16:78-79. |
| Materials | wood | | Vossen, H. A. M. van der & M. Wessel, eds. 2000. Stimulants. In: Faridah Hanum, I. & L. J. G. van der Maesen, eds., Plant Resources of South-East Asia (PROSEA) 16:78-79. |
| Medicines | folklore | | Leung, A. Y. & S. Foster. 1996. Encyclopedia of common natural ingredients used in food, drugs, and cosmetics, ed. 2 |
| Medicines | folklore | | Duke, J. A. et al. 2002. CRC Handbook of medicinal herbs |
| Medicines | folklore | | Vossen, H. A. M. van der & M. Wessel, eds. 2000. Stimulants. In: Faridah Hanum, I. & L. J. G. van der Maesen, eds., Plant Resources of South-East Asia (PROSEA) 16:78-79. |
| Medicines | folklore | | McGuffin, M., J. T. Kartesz, A. Y. Leung, & A. O. Tucker. 2000. Herbs of commerce, ed. 2 American Herbal Products Association, Silver Spring, Maryland. |
| Social | masticatory | | Vossen, H. A. M. van der & M. Wessel, eds. 2000. Stimulants. In: Faridah Hanum, I. & L. J. G. van der Maesen, eds., Plant Resources of South-East Asia (PROSEA) 16:78-79. |
| Social | religious/secular | nuts are used in ceremonies\ | Vossen, H. A. M. van der & M. Wessel, eds. 2000. Stimulants. In: Faridah Hanum, I. & L. J. G. van der Maesen, eds., Plant Resources of South-East Asia (PROSEA) 16:78-79. |
| Social | stimulant | | Vossen, H. A. M. van der & M. Wessel, eds. 2000. Stimulants. In: Faridah Hanum, I. & L. J. G. van der Maesen, eds., Plant Resources of South-East Asia (PROSEA) 16:78-79. |