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.

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

scientific & academic publishing: an open-access publisher of journals covering a wide range of academic disciplines,provides publishing serves the world's research and scholarly communities

academic journals accelerates the dissemination of knowledge through the publication of high quality research articles using the open access model.

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science publishing group is an international publisher of journals, special issues, books and conferences, covering a wide range of academic disciplines.

international journal of engineering research & technology - quickly publish your original papers in peer reviewed, high impact, open access, broad scope, widely indexed & fast track journal & get free hard copies, certificate of publication - launched in 2012