If you ever find an interesting academic paper in Google's search results:
...and when you click on the result, the page says that you need a subscription:
... go back and click on "All n versions", below the search snippet, to find other versions of the paper from Google Scholar. If you're lucky, you'll find the paper in the HTML, PDF or PostScript format.
Tip: to find a link to the full version of an academic paper in Google Scholar, look for the green arrow.
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