BASE | 余生运营工具书签|余生运营书签

基于开源软件建设学术搜索引擎，近130万篇文献。More than 200 mio. scientfic documents from more than 8000 content providers. BASE is one of the world's most voluminous search engines for academic web resources.

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小力盘

小力盘，提供最新kindle|PDF|txt|mobi|epub电子书图书免费下载，以kindle|PDF|txt|mobi|epub为主的电子书免费下载供学习使用。

PubMed

免费提供生物医学方面的论文搜寻以及摘要的数据库。PubMed® comprises more than 34 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full text content from PubMed Central and publisher web sites.

CALIS OPAC

支持集中搜索众多高校图书馆的图书资源目录

DART-Europe

从28个欧洲国家的615所大学获得793234份开放获取研

CiteSeerX

专注计算机和信息科学领域的文献检索平台

WorldWideScience

对70多个国家的61个数据库及门户进行跨语言搜索。WorldWideScience.org is a global science gateway accelerating scientific discovery and progress through a multilateral partnership to enable federated searching of national and international scientific databases.

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