Musa, D. N. S., and A. A. Nuruddin. “Calorific Value of Leaves of Selected Dipterocarp Trees Species in Piah Forest Reserve, Perak”. Journal of Tropical Resources and Sustainable Science (JTRSS), vol. 3, no. 1, May 2015, pp. 132-4, doi:10.47253/jtrss.v3i1.544.