CYCADACEAE, STANGERIACEAE i ZAMIACEAE
Turtle Taxonomy Working Group [van Dijk, P. P., Iverson, J. B., Rhodin, A. G. J., Shaffer, H. B. & Bour, R.] (2014): Turtles of the world, 7. vydanie: Annotated checklist of taxonomy, synonymy, distribution with maps, and conservation status.