If anyone is having trouble accessing <a href="https:&#x2F;&#x2F;scihub.io" rel="nofollow">https:&#x2F;&#x2F;scihub.io</a> (the site providing the papers) you can find the site directly at the ip address: <a href="https:&#x2F;&#x2F;31.184.194.81&#x2F;" rel="nofollow">https:&#x2F;&#x2F;31.184.194.81&#x2F;</a> ... Apparently the domain name was seized.  The certificate is for sci-hub.io (safe to accept).  Or you can just connect to <a href="http:&#x2F;&#x2F;31.184.194.81&#x2F;" rel="nofollow">http:&#x2F;&#x2F;31.184.194.81&#x2F;</a> if you don&#x27;t want to bother with the warnings (and are ok with DOIs and papers being transmitted without encryption).<p>EDIT:<p>Their other domains:<p><a href="https:&#x2F;&#x2F;sci-hub.cc" rel="nofollow">https:&#x2F;&#x2F;sci-hub.cc</a> (uses sci-hub.io certificate)<p><a href="https:&#x2F;&#x2F;sci-hub.bz" rel="nofollow">https:&#x2F;&#x2F;sci-hub.bz</a> (uses a separate certificate and ip address -- 104.28.20.155)<p>And a tor site: scihub22266oqcxt.onion