Template:Bremekamp, 1964
- Bremekamp, C.E.B. 1964. On the systematic position of the Australian Nelsonias and Thunbergias and the Ruellia species which by Domin were referred to Aporuellia Clarke. Proceedings, Koninklijke Nederlandse Akademie van Wetenschappen. Series C, Biological and Medical Sciences 67: 301–306. PDF