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Boykin, Laura M.; Kubatko, Laura Salter; Lowrey, Timothy K. (2010). "Comparison of methods for rooting phylogenetic trees: A case study using Orcuttieae (Poaceae: Chloridoideae)". Molecular Phylogenetics and Evolution. 54 (3): 687–700. Bibcode:2010MolPE..54..687B. doi:10.1016/j.ympev.2009.11.016. PMID19931622.