The links to Wikipedia are actual citations to real sources
I read an interesting article a few years ago about the Wikipedia source problem. It did a dive into how sources that seem legitimate on Wikipedia can and up citing sources that are less so. They were able to trace back the citations to Wikipedia itself. So no, they’re not always real sources.
LLMs basically just generate something that looks like the link to a credible source which might support what it’s said. It doesn’t care if its “source” actually supports what it says.
Which is why you read the page it has linked for you as a source. Unless you’re trying to say it full on generates a page for you.
Dulce et Decorum Est
By Wilfred Owen
https://www.poetryfoundation.org/poems/46560/dulce-et-decorum-est