- In most scholarly journal articles, the DOI will be printed with the article itself, usually on the first page somewhere: below the title or in the header or footer.
- The DOI can also be found in the search result entires of most databases.
- Zoterobib (https://zbib.org/ can be used to find a DOI by inputting citation information such as article title and author name.
Generally, DOIs will be available for scholarly articles published after 2011. Some articles before 2011 have them but many don't.