CORE

Anna’s Archive

annas-archive.org

Open Library

openlibrary.org

Academia.edu

academia.edu

MIT Open Library

openlearning.mit.edu

MIT OpenCourseWare

ocw.mit.edu

arXiv.org

arxiv.org

Wiley Online Library

onlinelibrary.wiley.com

Oxford Academic

academic.oup.com

Inciteful

inciteful.xyz

F1000 research

f1000research.com

Papers with Code

paperswithcode.com

Zenodo

zenodo.org

Authorea

authorea.com

PaperBrain

paperbrain.study

OSF

osf.io

Crossref

crossref.org

OA.mg

oa.mg

R Concept

covid19.researcher.life

BMC

biomedcentral.com

ROAD

road.issn.org

ResearchHub

researchhub.com

Hindawi

hindawi.com

ssrn.com

ssrn.com

OpenCurriculum

opencurriculum.org