Mattapha, S., S. Suddee, and S. Rueangruea. “Sophora Huamotensis, a New Species of Sophora (Fabaceae-Papilionoideae-Sophoreae) from Thailand”. Thai Forest Bulletin (Botany), vol. 46, no. 1, Feb. 2018, pp. 4-9, doi:10.20531/tfb.2018.46.1.02.