I'm surprised the links work for you at all. 90+% of citations for non trivial information (i.e. not in a text book but definitely in the literature) I've gotten from LLMs have been very convincing hallucinations. The year and journal volume will match, the author will be someone who plausibly would have written on the topic, but the articles don't exist and never did. It's a tremendous waste of time and energy compared to old fashioned library search tools.