Ah! "Bibliography" is an ambiguous term.

As the linked article says, one measure that journals are starting to adopt is requiring DOI or PMID links for each reference. It ought to be standard anyway, it's much less work for reviewers to check the references if they're easy to find. Even if they exist, they often don't say what the authors cite them as saying. But journals don't pay anyone for checking these things so it often doesn't get done. Peer review needs to be paid for. For-profit journals need to die.