The rise of the "open" discovery indexes? Lens.org, Semantic Scholar and Scinapse | Musings about librarianship oa.scite

"In this blog post, I will talk specifically on a very important source of data used by Academic Search engines - Microsoft Academic Graph (MAG) and do a brief review of four academic search engines - Microsoft Academic, Lens.org, Semantic Scholar and Scinapse ,which uses MAG among other sources.... We live in a time, where large (>50 million) Scholarly discovery indexes are no longer as hard to create as in the past, thanks to the availability of freely available Scholarly article index data like Crossref and MAG."