* "A proof that Unix utility sed is Turing complete" https://catonmat.net/proof-that-sed-is-turing-complete
* https://github.com/izabera/cube.sed
* "A proof that Unix utility sed is Turing complete" https://catonmat.net/proof-that-sed-is-turing-complete
* https://github.com/izabera/cube.sed