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Neubig K, Herrera F, Manchester S, Abbott JR (2012-07-07). Fossils, biogeography and dates in an expanded phylogeny of Ulmaceae. Botany 2012: Annual Meeting of the Botanical Society of America in Columbus, Ohio, USA. St. Louis, Missouri: Botanical Society of America. Abstract 316. Архивирано из оригинала 05. 12. 2017. г. Приступљено 29. 05. 2019.