Lua, Rus, Doc, Coroutines

https://lua.org.ru/

https://lua.org.ru/main.html#documentation

https://lua.org.ru/contents_ru.html

http://lua-users.org/wiki/TutorialDirectory

http://lua-users.org/wiki/ThreadsTutorial

https://www.lua.org/source/

Coroutines

https://www.lua.org/pil/9.1.html