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Southgate, Patel & Barrington 2019. Southgate, Morgan W.; Patel, Nikisha R.; Barrington, David S. (2019). "Ecological outcome of allopolyploidy in Adiantum (Pteridaceae): niche intermediacy and expansion into novel habitats". Rhodora. 121 (986): 108–135. doi:10.3119/18-09. S2CID199639192.