https://www.gameskinny.com/opinion/sciencing-the-shit-out-of-attack-on-titans-titans/#:~:text=This%20is%20called%20Galileo's%20Square,is%2010%20times%20the%20height.

https://www.reddit.com/r/ShingekiNoKyojin/comments/h9exdp/manga_spoilers_theory_what_are_titans_made_of/

https://en.wikipedia.org/wiki/Square%E2%80%93cube_law

https://attackonbiology.weebly.com/titans.html