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CALDWELL, Michael W.; NYDAM, Randall L.; PALCI, Alessandro. The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution. Nature Communications. 2015-01-27, roč. 6, s. 5996. Dostupné online [cit. 2018-01-26]. ISSN2041-1723. doi:10.1038/ncomms6996. (En)
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CALDWELL, Michael W.; NYDAM, Randall L.; PALCI, Alessandro. The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution. Nature Communications. 2015-01-27, roč. 6, s. 5996. Dostupné online [cit. 2018-01-26]. ISSN2041-1723. doi:10.1038/ncomms6996. (En)