中国学术文献、外文文献、学位论文、报纸、会议、年鉴、工具书等各类资源统一检索、统一导航、在线阅读和下载服务平台
DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community
NSTL开放学术资源系统网
Part of Z-Library project. The world's largest ebook library
当今科学界最具争议性的项目。Sci-hub的目标是 免费并且不受限制地 提供所有科学知识。
Open Access Library Search Engine, Journal, Index, Repository
文献查找工具
DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community