Norhayati, I., Getha, K., Muhd Haffiz, J., Mohd Ilham, A., Lili Sahira, H., Siti Syarifah, M. M., Muhd Syamil, A., (2013). Journal of Tropical Forest Science 25(1), 52-59. Forest Research Institute Malaysia, Kuala Lumpur, Malaysia. English language
Bauer, P. J., (2007). Planter 83(978), 621-626. Incorporated Society of Planters, Kuala Lumpur, Malaysia. English language
Ahmad Zuhaidi, Y., Zakaria, I., Rosdi, K., (2002). A manual for forest plantation establishment in Malaysia, 13-24. Forest Research Institute Malaysia, Kuala Lumpur, Malaysia. English language
Ahmad, D. H., Sulaiman, R., (2000). Bio-technology applications for reforestation and biodiversity conservation. Proceedings of the 8th International Workshop of BIO-REFOR, Kathmandu, Nepal, November 28-December 2, 1999, 47-50. BIO-REFOR, Ministry of Forests and Soil Conservation, Kathmandu, Nepal. English language
Muuss, U., (1996). Forstarchiv 67(2), 65-70. German language
Mohd. Hamami Sahri, Ling Kwong Hung, Harun, J., Ahmad, F. B. H., (1993). Pertanika Journal of Tropical Agricultural Science 16(2), 137-142. English language
Sakurai, K., Hosomi, K., Arakawa, T., Uzawa, M., Ito, Y., Saburi, Y., (1992). Bioscience, Biotechnology and Biochemistry 56(6), 975. English language
Arakawa, T., Shibata, M., Hosomi, K., Watanabe, T., Honma, Y., Kawasumi, K., Takeuchi, Y., (1992). Shokuhin Eiseigaku Zasshi = Journal of the Food Hygienic Society of Japan 33(6), 569-575. Japanese language
Fann, J. D., Chen, T. Y., (1991). Forest Products Industries 10(3), 45-58. Chinese language
Sahri, M. M., Harun, J., Hung, L. K., (1989). IAWA Bulletin 10(3), 345-346. English language