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Escapa, Ignacio H.; Decombeix, Anne‐Laure; Taylor, Edith L. ja Taylor, Thomas N.: Evolution and Relationships of the Conifer Seed Cone Telemachus: Evidence from the Triassic of Antarctica. International Journal of Plant Sciences, kesäkuu 2010, 171. vsk, nro 5, s. 560–573. The University of Chicago Press. doi:10.1086/651948. (englanniksi)
