Scopus

支持集中搜索众多高校图书馆的图书资源目录

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.

从28个欧洲国家的615所大学获得793234份开放获取研

专注计算机和信息科学领域的文献检索平台

为科学、技术和医学文献提供在线搜索引擎和租赁服务。DeepDyve is the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

最权威的工程、应用科学领域文献检索平台，Engineering Village Error page