I used Sci-Hub a few times already to download articles I need. Due to the epidemic all the libraries of my country are closed and Sci-Hub was helping me A LOT…
Why am I not able to download [this one](https://www.degruyter.com/view/book/9783111355818/10.1515/9783111355818.54.xml)? It’s from De Gruyter. If I put the DOI on Sci-Hub homepage it just doesn’t work.