K.  Tangjitman, Wongsawad, C., Winijchaiyanan, P., Sukkho, T., Kamwong, K., Pongamornkul, W., and Trisonthi, C., ?Traditional knowledge on medicinal plant of the Karen in northern Thailand: A comparative study?, Journal of EthnopharmacologyJournal of Ethnopharmacology, vol. 150, pp. 232-243, 2013.