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WATERHOUSE, David M.; LINDOW, Bent E. K.; ZELENKOV, Nikita V. TWO NEW PARROTS (PSITTACIFORMES) FROM THE LOWER EOCENE FUR FORMATION OF DENMARK. Palaeontology. 2008-05, roč. 51, čís. 3, s. 575–582. Dostupné online [cit. 2024-04-22]. ISSN0031-0239. doi:10.1111/j.1475-4983.2008.00777.x. (anglicky)
WATERHOUSE, David M.; LINDOW, Bent E. K.; ZELENKOV, Nikita V. TWO NEW PARROTS (PSITTACIFORMES) FROM THE LOWER EOCENE FUR FORMATION OF DENMARK. Palaeontology. 2008-05, roč. 51, čís. 3, s. 575–582. Dostupné online [cit. 2024-04-22]. ISSN0031-0239. doi:10.1111/j.1475-4983.2008.00777.x. (anglicky)