Google Scholar 

Is a search engine for the scientific and academic works needed by the researcher can search through many scientific fields such as research, scientific messages and books of academic publishers, specialized institutions, scientific centers, universities and other scientific research institutions and helps the researcher to identify the most scientific research related to the field of specialization in The world of scientific research

Google Scholar Website:

     https://scholar.google.com

     Google Scholar Directory​

To create an account on Google Scholar:
https://accounts.google.com/SignUp?continue=https%3A%2F%2Fscholar.google.com%2F&hl=en​