Z.R.Xu & B.L.Burtt 1991 - Zhaoran X, Burtt BL (1991) Towards a revision of Paraboea (Gesneriaceae): I. Edinburgh Journal of Botany 48(01): 1. doi: 10.1017/S0960428600003541.
There is no corrections for Paraboea trachyphylla yet.