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Refdesk - free and family-friendly web site that indexes and reviews quality, credible, and current web-based resources; DeepDyve - big archive of literary and scholarly journal articles; free five-minute full-text previews.
PubMed Central is a free digital archive of full articles, accessible to anyone from anywhere via a web browser (with varying provisions for reuse). Conversely, although PubMed is a searchable database of biomedical citations and abstracts, the full-text article resides elsewhere (in print or online, free or behind a subscriber paywall).
The terms "free", "subscription", and "free & subscription" will refer to the availability of the website as well as the journal articles used. Furthermore, some programs are only partly free (for example, accessing abstracts or a small number of items), whereas complete access is prohibited (login or institutional subscription required).
The following presents a non-exhaustive list of sources whose reliability and use on Wikipedia are frequently discussed. This list summarizes prior consensus and consolidates links to the most in-depth and recent discussions from the reliable sources noticeboard and elsewhere on Wikipedia.
Encompasses articles on the topic of mathematics: Free Encyclopedia of Triangle Centers: English Information about ten thousands of triangle centers, including coordinates, operations, incidence, equations, etc. Free EqWorld: English, Russian Articles on mathematical equations: Free MathWorld: English Articles on a wide variety of mathematics ...
From today's featured article The cherry-throated tanager ( Nemosia rourei ) is a critically endangered bird native to the Atlantic Forest in Brazil. Since its description in 1870, there had been no confirmed sightings for more than 100 years, and it was feared that the species was extinct .
JSTOR (/ ˈ dʒ eɪ s t ɔːr / JAY-stor; short for Journal Storage) [2] is a digital library of academic journals, books, and primary sources founded in 1994. Originally containing digitized back issues of academic journals, it now encompasses books and other primary sources as well as current issues of journals in the humanities and social sciences. [3]
"free availability on the public internet, permitting any users to read, download, copy, distribute, print, search, or link to the full texts of these articles, crawl them for indexing, pass them as data to software, or use them for any other lawful purpose, without financial, legal, or technical barriers other than those inseparable from ...