Google closes off free, public access to scholarly literature
What they don't tell you, however, is that the search service now only links to front-end citation pages for article archives that charge membership fees or download fees.
Many of these scholarly articles have been freely indexed on the Web in the form of .PDF files and .HTML pages. If they are still there, Google has apparently now helped to bury them deeply back in the "invisible web", that segment of the World Wide Web that surfers mostly cannot reach through search engines.
Since the interface for Google Scholar has just been redesigned, one can suppose that maybe an entirely new crawl is required to repopulate the index. However, relying on fee-based article archives is hardly the best way to bring humanity's knowledge closer to people's finger tips.