KRACHAI, PUNTIWA, PRANOM CHANTARANOTHAI, and NARUMOL PIWPUAN. 2009. “Pollen Characteristics of Polygala, Salomonia and Xanthophyllum (Polygalaceae) in Thailand”. Tropical Natural History 9 (1):27-34. https://doi.org/10.58837/tnh.9.1.102959.