The Fries Test: Does a work have more than one disabled character? Do the disabled characters have their own narrative purpose other than the education and profit of a nondisabled character? Is the character’s disability not eradicated either by curing or killing?
Also, some articles:
https://medium.com/@kennyfries/the-fr...
http://whoamitostopit.com/2017/12/07/...
https://nicolagriffith.com/2017/11/04...