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PEREIRA, Sergio L.; JOHNSON, Kevin P.; CLAYTON, Dale H. Mitochondrial and Nuclear DNA Sequences Support a Cretaceous Origin of Columbiformes and a Dispersal-Driven Radiation in the Paleogene. Systematic Biology. 2007-08-01, roč. 56, čís. 4, s. 656–672. Dostupné online [cit. 2024-03-23]. ISSN1076-836X. doi:10.1080/10635150701549672. (anglicky)
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PEREIRA, Sergio L.; JOHNSON, Kevin P.; CLAYTON, Dale H. Mitochondrial and Nuclear DNA Sequences Support a Cretaceous Origin of Columbiformes and a Dispersal-Driven Radiation in the Paleogene. Systematic Biology. 2007-08-01, roč. 56, čís. 4, s. 656–672. Dostupné online [cit. 2024-03-23]. ISSN1076-836X. doi:10.1080/10635150701549672. (anglicky)