jstor is a digital library of academic journals, books, and primary sources.

Elsevier is a global information analytics company that helps institutions and professionals progress science, advance healthcare and improve performance

Discover how we are transforming scholarly publishing with a mission-driven commitment to open science, research integrity, and innovation that benefits researchers, institutions, and society worldwide.

aminer由清华大学计算机科学与技术系建立，包含了超过3.2亿学术论文/专利和1.33 亿学者的科技图谱，提供学术检索、论文检索，推荐订阅、论文专利、学者画像、文献追踪、趋势分析等科技情报服务，是拥有我国完全自主知识产权的学术科技情报大数据挖掘与服务系统平台。

academic journals accelerates the dissemination of knowledge through the publication of high quality research articles using the open access model.

search and explore the millions of quality, peer-reviewed journal articles published under the taylor & francis and routledge imprints.

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

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