The NLM Catalog provides access to NLM bibliographic data for journals, books, audiovisuals, computer software, electronic resources and other materials. Links to the library's holdings in LocatorPlus, NLM's online public access catalog, are also provided. Electronic Link
The official DOI (digital object identifier) link registration agency for scholarly and professional publications. Crossref operates a cross-publisher citation linking system that allows a researcher to click on a reference citation on one publisher’s platform and link directly to the cited content on another publisher’s platform, subject to the target publisher’s access control practices. This citation-linking network covers millions of articles and other content items from several hundred scholarly and professional publishers.
Provides a simple way to search broadly for scholarly literature. Includes peer-reviewed papers, theses, books, abstracts, and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations. Google Scholar sorts articles by weighing the full text of each article, the author, the publication in which the article appears, and how often the article has been cited in other scholarly literature so that the most relevant results are returned on the first page.
The Index Medicus for the Eastern Mediterranean Region (IMEMR), one of the major projects of the Virtual Health Sciences Library (VHSL), was initiated in response to a pressing need to index health and biomedical journals. Currently, the Index includes more than 180 000 bibliographic citations from more than 645 health and biomedical journals published in 20 countries of the Region: Afghanistan, Bahrain, Egypt, Iraq, Islamic Republic of Iran, Jordan, Kuwait, Lebanon, Libya, Morocco, Oman, Pakistan, occupied Palestinian territory, Qatar, Saudi Arabia, Sudan, Syrian Arab Republic, Tunisia, United Arab Emirates and Yemen.
The Directory of Research Journal Indexing (DRJI) increases the visibility and ease of use of open access scientific and scholarly journals thereby promoting their increased usage and impact. DRJI supply champion has access to global-renowned content in all discipline areas including magazine and journal articles. DRJI encourages the participation of all persons, groups, and organizations interested in indexing and related methods of information retrieval.
Open Academic Journals Index (OAJI) is a full-text database of open-access scientific journals. The mission is to develop an international platform for indexing the scientific journals of open access. The Current Global Index of the Journal (CGIJ) OAJI is created taking into account the current global trends and challenges in the field of indexing the scientific journals.
WorldCat is the largest library catalog globally. It comprises a vast network of library-based content and services. WorldCat lets you search individual libraries within the community and thousands of other libraries around the world. It also provides access to online articles, books, and journals.
Libris is a combined directory of the Swedish academic and research libraries. The National Library of Sweden is accountable for the updating and developmental procedures of this online search service. The search engine is monitored and updated on daily basis. Libris links you to Swedish research libraries and the public libraries as well. It provides access to books, periodicals, articles, maps, posters, printed music, electronic resources, etc.
Open Science Directory (UNESCO) - Global Open Access Portal
The Global Open Access Portal is designed to provide necessary information for policy-makers. The portal provides an overview of the framework surrounding Open Access in the UNESCO Member States. It provides a high-level view of the Open Access environment and is not designed to provide an inventory of repositories, Open Access journals, and other associated initiatives.
ROAD is a service offered by the ISSN International Centre with the support of the Communication and Information Sector of UNESCO. ROAD counts as of today 19,157 records, while the ISSN Network has assigned more than 1.9 million ISSN.
Microsoft Academic Research
Microsoft academic research is yet another top search engine for academic resources. Developed by Microsoft Research, it has more than 48 million publications written by over 20 million authors. It indexes a range of scientific journals from computer science and engineering to social science and biology. It has brought in many new ways to search academic resources, such as papers, authors, conferences and journals. This academic search engine allows you to search information based on authors or domains.
The Registry of Open Access Repository Mandates and Policies (ROARMAP) is a searchable international registry charting the growth of open access mandates and policies adopted by universities, research institutions and research funders that require or request their researchers to provide open access to their peer-reviewed research article output by depositing it in an open access repository.