mdpi is a publisher of peer-reviewed, open access journals since its establishment in 1996.

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semantic scholar uses groundbreaking ai and engineering to understand the semantics of scientific literature to help scholars discover relevant research.

scientific research publishing is an academic publisher with more than 200 open access journal in the areas of science, technology and medicine. it also publishes academic books and conference proceedings.

sci-hub website. get free access to academic journals. download research papers for free from sciencedirect, ieee, wiley, springer, nature and others

the world’s largest collection of open access research papers

intechopen is a leading global publisher of journals and books within the fields of science, technology and medicine. we are the preferred choice of over 60,000 authors worldwide.

open access publisher of peer-reviewed scientific articles across the entire spectrum of academia. research network for academics to stay up-to-date with the latest scientific publications, events, blogs and news.

quillbot's paraphrasing tool is trusted by millions worldwide to rewrite sentences, paragraphs, or articles using state-of-the-art ai.