refseek |
A search engine designed for students and researchers, providing access to over a billion documents, including web pages, books, encyclopedias, and journals. |
WorldCat |
A global catalog of library collections, allowing users to search for books, music, and other materials available in libraries near them. |
SpringerLink |
A comprehensive online resource offering access to millions of research articles, books, and reference works from a variety of scientific disciplines. |
BiolineInternational |
A nonprofit scholarly publishing cooperative providing open access to quality research journals published in developing countries. |
RePEc |
A decentralized database of working papers, journal articles, and other research outputs in economics and related sciences. |
Science.gov |
A gateway to U.S. government science information, providing access to research and development results, journal articles, and technical reports across a wide range of scientific fields. |
Bielefeld Academic Search Engine |
One of the world's most voluminous search engines, especially for academic web resources, offering access to millions of documents from various sources. |
Sci-Hub: knowledge must be free |
A controversial online repository providing free access to millions of research papers, bypassing paywalls of major academic publishers. |
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