> Where are the references?

The references are scattered throughout the article.

The color scheme makes it a lot harder to catch that they are there. The links don't look like links (don't do that OP).

But once you realize that, you can see that there are a bunch of references back to the linux source throughout the article.

That said, that color scheme isn't always a clickable link. I gotta say, the author needs to be a lot better about consistency. They use blue links, grey text that's actually a link, and the same grey text that isn't a link.

Discovering what is clickable and what's not is a mess. This should be a lot clearer. Ideally everything would be a blue link like in the first paragraph.