Access theses and open access research papers by searching institutional repositories containing the research outputs of universities and other organisations. Contents are indexed by search engines so you will also find them in web search results. You can search:
CORE - The world’s largest collection of open access research papers.
OpenDOAR - a global Directory of Open Access Repositories. You can search and browse through thousands of registered repositories based on a range of features, such as location, software or type of material held.