Oguri, E., Tagane, S., Dang, V.-S., Yang, C.-J., Toyama, H., Tran, H., Murakami, N. and Yahara, T. (2019) “A new species of Gynochthodes (Rubiaceae), G. honbaensis from Hon Ba Nature Researve, southern Vietnam”, Phytotaxa. Auckland, New Zealand, 406(3), pp. 213–217. doi: 10.11646/phytotaxa.406.3.8.