How to query English literature?

You can use the following methods to query English literature:

1. Use Google Academic Search, enter keywords, and then click the "Citation" button to view the citation information of related literature.

2. Use WebofScience, which is a charged database, but it provides many useful functions, such as citation analysis and document management.

3. Use PubMed of NCBI, which is a free database, but the loading speed is slow.

4. Use Sci-Hub.cc, which is a free website where you can download paid papers and periodicals.