access 160+ million publications and connect with 25+ million researchers. join for free and gain visibility by uploading your research.

science/aaas peer-reviewed journals deliver impactful research, daily news, expert commentary, and career resources.

mdpi is a publisher of peer-reviewed, open access journals since its establishment in 1996.

semantic scholar uses groundbreaking ai and engineering to understand the semantics of scientific literature to help scholars discover relevant research.

sci-hub website. get free access to academic journals. download research papers for free from sciencedirect, ieee, wiley, springer, nature and others

internet archive is a non-profit digital library offering free universal access to books, movies & music, as well as 624 billion archived web pages.

proceedings of the national academy of sciences (pnas), a peer reviewed journal of the national academy of sciences (nas) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.

复旦大学（fudan university），简称“复旦”，位于中国上海，由中华人民共和国教育部直属，中央直管副部级建制，国家双一流（a类）、985工程、211工程建设高校，入选珠峰计划、111计划、2011计划、卓越医生教育培养计划、卓越法律人才教育培养计划、国家建设高水平大学公派研究生项目，九校联盟（c9）、中国大学校长联谊会、东亚研究型大学协会、环太平洋大学协会的重要成员，是一所世界知名、国内顶尖的全国重点大学。

library genesis is a scientific community targeting collection of books on natural science disciplines and engineering.

the world’s largest collection of open access research papers