Thammarong, W., Rakarcha, S., Pongamornkul, W. and Rodda, M. (2021) “Heterostemma menghaiense (Apocynaceae), a new record for Laos and Thailand”, Thai Forest Bulletin (Botany), 49(1), pp. 63–65. doi: 10.20531/tfb.2021.49.1.07.