El debate sobre cryptozoology:
https://www.helium.com/debates/158588-is-cryptozoology-a-valid-science/side_by_side
https://web.ncf.ca/bz050/criticalcz.html
About cryptozoology
https://www.cryptomundo.com/cryptozoo-news/cryptozooterms/
https://www.livescience.com/animals/top10_creatures_of_cryptozoology-1.html