Use academic search engines and try BASE or CORE Discovery, which specialise in Open Access content.

• BASE
• CORE Discovery
• Google Scholar
• PubMed

• edoc: The University of Basel’s edoc institutional repository lists all scientific publications created at the university and makes them visible worldwide and permanently accessible. edoc is operated by the University Library and enables the implementation of the University of Basel’s Open Access Policy. The contents of edoc are listed in search engines and academic search services such as Google Scholar, OpenAIRE (Horizon 2020), Unpaywall, Core or BASE.

Ask authors directly via academic networks or directly by email:

• ResearchGate 
• Academia.edu