Trường, L.H., Đăng, T.H., Nhân, P.H., Trung, N.T.Q., Đạt, N.Q. & Long, V.N. (2018)

Two new species of Billolivia (Gesneriaceae) with yellow flowers from Vietnam

. Phytotaxa 362 (2): 227–232. https://doi.org/10.11646/phytotaxa.362.2.9