BASE: Bielefeld Academic Search Engine
BASE provides more than 100 million documents from more than 4,000 sources. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library.
EconBiz
EconBiz is a search portal for economics and business studies. It offers:
A literature search across important German and international databases;
Access to full texts on the internet;
Acalendar of events for scholarly conferences and summer schools;
Reference service Research Guide EconDesk which answers your questions about the search for literature and statistical data.
Elementa: Science of the Anthropocene
Atmospheric Science
Earth & Environmental Science
Ecology
Ocean Science
Sustainability Transitions
Sustainable Engineering
Microsoft Academic
"Semantic search" responds with results based on more than keywords
National Bureau of Economics Research
a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, and business professionals.
NBER-affiliated researchers study a wide range of topics and they employ many different methods in their work. Key focus areas include developing new statistical measurements, estimating quantitative models of economic behavior, and analyzing the effects of public policies.
OpenGrey - Grey Literature
System for Information on Grey Literature in Europe, is your open access to 700.000 bibliographical references of grey literature (paper) produced in Europe and allows you to export records and locate the documents.
Examples of grey (gray) literature include technical or research reports, doctoral dissertations, some conference papers, some official publications, and other types of grey literature. OpenGrey covers Science, Technology, Biomedical Science, Economics, Social Science and Humanities. The site includes preprints from the GL conferences (GreyNet International) in full text.
RefSeek
RefSeek's unique approach offers students comprehensive subject coverage without the information overload of a general search engine—increasing the visibility of academic information and compelling ideas that are often lost in a muddle of sponsored links and commercial results.
Springer Open
Offers a roster of more than 160 peer-reviewed, open access journals, as well as their more recent addition of free access books, covering all scientific disciplines.
ASDL: Analytical Sciences Digital Library
ASDL, collects, catalogs, links and publishes peer reviewed web-based discovery materials pertinent to innovations in curricular development and supporting technical resources in the analytical sciences.
BioMed Central
UK-based publisher of 258 peer-reviewed open access journals. Their published works span science, technology and medicine and include many well-regarded titles.
BioOne
BioOne is a nonprofit publisher that aims to make scientific research more accessible through a growing portfolio of products including its full-text aggregation, BioOne Complete, and open-access journal, Elementa: Science of the Anthropocene. Established in 1999 by five founding organizations—the American Institute of Biological Sciences (AIBS), the Scholarly Publishing & Academic Resources Coalition (SPARC), The University of Kansas, the Greater Western Library Alliance (GWLA), and Allen Press, Inc—BioOne serves a community of over 140 society and institutional publishers, 4,000 accessing institutions, and millions of researchers worldwide.
The Clay Mathematics Institute
The Clay Mathematics Institute (CMI) is a privately funded operating foundation dedicated to increasing and disseminating mathematical knowledge.
Copernicus Publications
An open-access scientific publisher in Germany since 2001. They are strong supporters of the researchers who create these articles, providing top-level peer review and promotion for their work.
De Gruyter Open
One of Germany’s leading publishers of open access content. Today DeGruyter Open (DGO) publishes about 400 owned and third-party scholarly journals and books across all major disciplines.
EDP Open
France-based scientific publisher with an international mission. They publish more than 50 scientific journals, with some 60,000 published pages annually.
Elementa: Science of the Anthropocene
Atmospheric Science
Earth & Environmental Science
Ecology
Ocean Science
Sustainability Transitions
Sustainable Engineering
Europe PMC
A database of biomedical and life sciences literature with access to full-text research articles and citation. Europe PMC includes resources from PubMed and PubMed Central (PMC), projects developed at the NCBI in the USA. Europe PMC is part of a network of PMC International (PMCI) repositories that also includes PMC Canada.
GMD - Gohn Metabolone Database
The Golm Metabolome Database (GMD) facilitates the search for and dissemination of reference mass spectra from biologically active metabolites quantified using gas chromatography (GC) coupled to mass spectrometry (MS). GC/MS profiling studies aiming at the identification of compounds from complex biological mixtures depend on the comparison of observed mass spectra and retention times with reference libraries such as the GMD. The GMD comprises mass spectra and retention time indices of pure reference substances and frequently observed mass spectral tags (MST: mass spectrum linked to chromatographic retention) of yet unidentified metabolites.
NASA: National Aeronautics and Space Administration PubSpace
PubMed Central (PMC) is a full-text, online archive of journal literature operated by the National Library of Medicine. NASA is using PMC to permanently preserve and provide easy public access to the peer-reviewed papers resulting from NASA-funded research.
Open Science Directory
Contains about 13,000 scientific journals, with another 7,000 special programs titles.
OSTI - Office of Science and Technical Information
U.S. Department of Energy. The Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions. The information is typically in the form of technical documents, conference papers, articles, multimedia, and software, collectively referred to as scientific and technical information (STI).
PubChem
U.S. National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Heath and Human Services.
SciELO - Scientific Electronic Library Online
SciELO is a bibliographic database and a model for cooperative electronic publishing in developing countries originally from Brazil. It contains 985 scientific journals from different countries in free and universal access, full-text format.
Science.gov
Science.gov searches over 60 databases and over 2200 selected websites from 15 federal agencies, offering 200 million pages of authoritative U.S. government science information including research and development results. Science.gov is governed by the interagency Science.gov Alliance.
Semantic Scholar - Allen Institute for Artificial Intelligence
singular focus of conducting high-impact research and engineering in the field of artificial intelligence, all for the common good. AI2 is the creation of Paul Allen, Microsoft co-founder, and is led by Dr. Oren Etzioni, a world-renowned researcher and professor in the field of AI and computer science.
WorldWideScience.org
Global science gateway comprised of national and international scientific databases and portals. WorldWideScience.org accelerates scientific discovery and progress by providing one-stop searching of databases from around the world (Architecture: What is under the Hood). Multilingual WorldWideScience.org provides real-time searching and translation of globally-dispersed multilingual scientific literature.
