Knopf, Patrick, Christian Schulz, Damon P. Little, Thomas St├╝tzel, and Dennis W. Stevenson. 2011.11.30. Relationships within Podocarpaceae based on DNA sequence, anatomical, morphological, and biogeographical data. Cladistics 28(3):271-299. DOI: 10.1111/j.1096-0031.2011.00381.x