Choopan, T., Grote, P.J., Chayamarit, K. and Simpson, D.A. 2018. Pollen morphology of subfamily Nelsonioideae (Acanthaceae) in Thailand. Asia-Pacific Journal of Science and Technology. 23, 2 (Apr. 2018), APST–23. DOI:https://doi.org/10.14456/kkurj.2018.7.