citrus-search.com
Citrus Search helps search books, ebooks, papers, library records, or reading archives.
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chinarxiv.org
ChinaRxiv helps search books, ebooks, papers, library records, or reading archives.
censorbib.nymity.ch
CensorBib helps search books, ebooks, papers, library records, or reading archives.
catalyzex.com
Catalyzex helps search books, ebooks, papers, library records, or reading archives.
bulletpapers.ai
BulletPapers helps search books, ebooks, papers, library records, or reading archives.
bioline.org.br
Bioline helps search books, ebooks, papers, library records, or reading archives.
asta.allen.ai
Ai2 Asta helps search books, ebooks, papers, library records, or reading archives.
addons.mozilla.org
ScholarKey helps search books, ebooks, papers, library records, or reading archives.
repository.alt.ac.uk
Association for learning Technology helps search books, ebooks, papers, library records, or reading archives.
researchgate.net
ResearchGate helps search books, ebooks, papers, library records, or reading archives.
biorxiv.org
Preprint server for biology research papers before peer review and journal publication.
arxiv.org
Open-access repository for preprints in physics, math, computer science, AI, and related fields.
gagarine.medium.com
PDF Download helps search books, ebooks, papers, library records, or reading archives.
authors.library.caltech.edu
Caltech Library helps search books, ebooks, papers, library records, or reading archives.
science.gov
Science.gov helps search books, ebooks, papers, library records, or reading archives.
core.ac.uk
Legal Core helps search books, ebooks, papers, library records, or reading archives.
alexandria.ucsb.edu
Alexandria helps search books, ebooks, papers, library records, or reading archives.
pmc.ncbi.nlm.nih.gov
PubMed Central helps search books, ebooks, papers, library records, or reading archives.
scholar.archive.org
Internet Archive Scholar helps search books, ebooks, papers, library records, or reading archives.
pubmed.ncbi.nlm.nih.gov
PubMed helps search books, ebooks, papers, library records, or reading archives.
scholar.google.com
Google search engine for scholarly articles, books, citations, patents, and academic profiles.
unpaywall.org
Browser extension and API for finding legal open-access versions of scholarly papers.
pdfdrive.com
PDF search engine for finding ebooks, documents, manuals, and downloadable PDF files.
z-lib.org
Book search and shadow-library site for finding ebooks, articles, and document records.