↑Bosma, Hylke F.; Kunzmann, Lutz; Kvaček, Jiří; van Konijnenburg-van Cittert, Johanna H.A. (August 2012). "Revision of the genus Cunninghamites (fossil conifers), with special reference to nomenclature, taxonomy and geological age". Review of Palaeobotany and Palynology. Elsevier. 182: 20–31. doi:10.1016/j.revpalbo.2012.06.004.CS1 maint: multiple names: authors leet (link)