Sci-Hub is an online search engine with over 58,000,000 academic papers and articles available for direct download, bypassing publisher paywalls. New papers are uploaded daily when accessed through educational institution proxies, and papers that have been accessed through Sci-Hub are stored in the LibGen repository.
Sci-hub was founded by Kazakh graduate student Alexandra Elbakyan in 2011, as a reaction to the high cost of research papers behind paywalls, typically US$30 each when bought on a per-paper basis.
In 2015 academic publisher Elsevier filed a legal complaint in New York City against Sci-hub alleging copyright infringement by Sci-Hub, and the subsequent lawsuit led to a loss of the original sci-hub.org domain. Following the first domain loss, Sci-Hub has cycled through a number of domains, some of which have been blocked in certain countries. Sci-Hub has been highly controversial, lauded by parts of the scientific and academic communities and condemned by a number of publishers.
Use Below Link and enter the URL of the research paper page you want to download.
Boom !!! Here you are with the copy of the research paper.
Source : https://en.wikipedia.org/wiki/Sci-Hub