Whitney, C. W.; Vang Sin, M. (Meej V.; Lê Hồng, G.; Vu Van, C.; Barber, K.; Thi Tran, L. Conservation and Ethnobotanical Knowledge of a Hmong Community in Long Lan, Luang Prabang, Lao People’s Democratic Republic. Ethnobot. Res. App. 2014, 12, 643-658.