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Sci-Hub website. Get free access to academic journals. Download research papers for free from ScienceDirect, IEEE, Wiley, Springer, Nature and others

Sci-Hub website. Get free access to academic journals. Download research papers for free from ScienceDirect, IEEE, Wiley, Springer, Nature and others

PubScholar公益学术平台是中国科学院作为国家战略科技力量的主力军，履行学术资源保障“国家队”职责，为满足全国科技界和全社会科技创新的学术资源基础保障需求，建设的提供公益性学术资源的检索发现、内容获取和交流共享等服务的平台。平台在尊重知识产权和国际通行规范的前提下，发挥中国科学院自身拥有丰富且高质量学术资源的优势，带动国内外的学术资源机构积极合作，最大限度地开放优质学术资源。目前，平台整合集成了中国科学院的科技成果资源、科技出版资源和学术交流资源；OA环境下允许集成服务的学术资源；以及通过协议授权或其它合作共建模式获得授权许可的学术资源。

ProQuest powers research in academic, corporate, government, public and school libraries around the world with unique content. Explore millions of resources from scholarly journals, books, newspapers, videos and more.

Science.gov is a gateway to government science information provided by U.S. Government science agencies, including research and development results.

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Crossref runs open infrastructure to link research objects, entities, and actions, creating a lasting and reusable scholarly record. As a not-for-profit with over 20,000 members in 160 countries, we drive metadata exchange and support nearly 2 billion monthly API queries, facilitating global research communication.

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