- https://en.wikipedia.org/wiki/Robots_exclusion_standard
- https://kinsta.com/blog/wordpress-robots-txt/
- https://www.fixrunner.com/wordpress-robots-txt/
- https://www.wpbeginner.com/wp-tutorials/how-to-optimize-your-wordpress-robots-txt-for-seo/
Yoast (apparently) does not let me edit robots.txt any more – most of the articles point me to Yoast.