paper search Artifact

1. unpaywall

     http://unpaywall.org  install the version of chrome  plugin  (GET THE EXTENSION)   (http://unpaywall.org/)

2. viziometrics(http://viziometrics.org/)

    search scholar paper through keywords and reading article when clicking it.

3. Sci-Hub（https://sci-hub.tw）or   https://sci-hub.is

    to remove all barriers in the way of science