https://www.secondshistory.com/home/2021/2/21/chocolate-mesoamerican-aphrodisiac

https://www.thespruceeats.com/the-history-of-hot-chocolate-764463

https://chocolateclass.wordpress.com/2015/02/20/the-evolution-of-drinking-chocolate/

https://veggiedesserts.com/xocolatl-aztec-hot-chocolate/

https://www.science.org/content/article/humans-were-drinking-milk-they-could-digest-it

https://friscolibrary.com/blogs/post/history-of-hot-chocolate/