Xu Bing. Source: Wikipedia.
Many journal articles will be found via Summon, but some important contemporary art journals are not available by this route. See the list of journals not searched by Summon.
Social media is vital for researching artists not well covered by conventional media, as well as breaking news stories. See the guide to searching social media. This includes some suggested email newsletters to subscribe to. Hyperallergic may be particularly useful.
The other newsletters listed here tend to focus on the most commercially successful artists, on major galleries, exhibitions and fairs, and on art world controversies. This range of interests is shared by the Art Newspaper, a key resource for these topics, though sometimes frustrating to search.