Harada, Ko, et al. “Genetic Variation and Genetic Structure of Two Closely Related Dipterocarp Species, Dryobalanops Aromatica C.F. Gaertn. and D. Beccarii Dyer”. Sibbaldia: The International Journal of Botanic Garden Horticulture, no. 16, July 2018, pp. 179-97, doi:10.24823/Sibbaldia.2018.255.