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3. A new coniferous male cone from the English Wealden and a discussion of pollination in the Cheirolepidiaceae;Alvin;Palaeontology,1994
4. Morphology and systematics of selected Mesozoic conifers;Arndt;Palaeontographica, B,2002
5. The Triassic conifer seed cone Glyptolepis;Axsmith;Rev. Palaeobot. Palynol.,1996