Template:Clement-Westerhof, 1987
- Clement-Westerhof, J.A. 1987. Aspects of Permian palaeobotany and palynology, 7: The Majonicaceae, a new family of Late Permian conifers. Review of Palaeobotany and Palynology 52(4): 375–402. DOI: 10.1016/0034-6667(87)90066-2