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This page from USU contains links to additional places to search for OER.
Search for Open Access journal articles
While the USU Libraries research databases do include Open Access articles in addition to subscription resources, there is a tool you can use to search some of these articles directly.
The Directory of Open Access Journals (DOAJ) is a resource for finding reputable Open Access journal articles. Their database "contains over 15,000 peer-reviewed open access journals covering all areas of science, technology, medicine, social sciences, arts and humanities."
You can use keywords to search for articles on your topic from their homepage by selecting "Articles" (instead of "Journals") before you search.