The original (and much better) title of this piece was "Legal questions raised over links to Sci-Hub". The article is about the story of Citationsy, covered here two weeks ago. The emphasis is on the legal threats being made by publishers over the service's linking to Sci-Hub. "Whether linking to materials that violate copyright law 'is or is not a copyright violation' doesn't have a straightforward answer," says an expert, and it's precisely that ambiguity that will allow publishers to limit speech in this way. The Sci-Hub website moves around a lot but you can always find it here.