Analysis of information sources in references of the Wikipedia article "งู" in Thai language version.
Caldwell, M. W.; Nydam, R. L.; Palci, A.; Apesteguía, S. (2015). "The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution". Nature Communications. 6 (5996): 5996. doi:10.1038/ncomms6996. PMID 25625704.
Caldwell, M. W.; Nydam, R. L.; Palci, A.; Apesteguía, S. (2015). "The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution". Nature Communications. 6 (5996): 5996. doi:10.1038/ncomms6996. PMID 25625704.
Caldwell, M. W.; Nydam, R. L.; Palci, A.; Apesteguía, S. (2015). "The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution". Nature Communications. 6 (5996): 5996. doi:10.1038/ncomms6996. PMID 25625704.
Caldwell, M. W.; Nydam, R. L.; Palci, A.; Apesteguía, S. (2015). "The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution". Nature Communications. 6 (5996): 5996. doi:10.1038/ncomms6996. PMID 25625704.