https://www.thecelticwiki.com/the-shawfield-disaster/
https://www.heraldscotland.com/opinion/14162325.tragedy-struck-football/
http://tirnaog09.blogspot.com/2015/01/a-forgotten-tragedy.html
https://www.goodreads.com/book/show/50123125-football-disasters
https://en.wikipedia.org/wiki/Shawfield_Stadium