Most of mine are from conversations with people, but this is what I immediately thought of (though I know the definition has changed a little since) https://books.google.com/books?id=QelNAQAAQBAJ

Here's another: https://practicaltheorist.wordpress.com/2012/11/14/the-myth-...

Here's a critique stating that the terms aren't defined enough to be said to be 'just'

http://assets.press.princeton.edu/chapters/s6818.pdf

The last one is the most fascinating, I really recommend you read it if you're interested in these things. Amartya Sen is brilliant.