Nine popular websites for accessing literature

1、Web of science

https://www.webofscience.com/wos/woscc/basic-search

2、Ei Engineering

https://www.engineeringvillage.com

3、IEEE xplore

https://ieeexplore.ieee.org/Xplore/home.jsp

4、Elsevier

https://www.sciencedirect.com/

5、SrpingLink

https://link.springer.com/

6、Nature

https://www.nature.com/

7、PNAS

https://www.pnas.org/

8、Socopus

https://www.scopus.com

9、Google Scholar

https://scholar.google.com/