
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.
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Semantic Scholar
一款基于机器学习的学术搜索引擎
万方
国内知名学术资料查询数据库
Copyscape Plagiarism Checker
免费的 plagiarism checker
LitSense
可按段落或句子搜索文献

Dupli Checker
免费的 plagiarism checker
爱思唯尔
全球性信息分析公司,查文献
SpringerLink
springer在线期刊和图书
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