百度学术
百度学术搜索，是一个提供海量中英文文献检索的学术资源搜索平台，涵盖了各类学术期刊、学位、会议论文，旨在为国内外学者提供最好的科研体验。
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PubMed
PubMed® comprises more than 33 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.
DOAJ
OA期刊文献检索系统
晨曦科技团队数字图书馆
免费文献获取神网站④
GeenMedical
基于SCI-hub文献下载的医学文献检索平台
BASE
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.
Vizio Metrics
图像检索
Wiley
Wiley在线数据库，Wiley是世界三大学术期刊出版商之一
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