NGUYEN, THANH TRUNG, YI-GANG WEI, FANG WEN, KHUONG DUY LE, and TRUONG VAN DO. 2020. “<em>Ophiorrhiza hoanglienensis</Em> (Rubiaceae), a New Species from North-Western Vietnam”.
Phytotaxa
438 (4):256–262. https://doi.org/10.11646/phytotaxa.438.4.4.