Hi @revistaodeere. Thanks for your question. Unfortunately, OJS is not our system. Generally speaking, the PKP Community Forum is a great place to get questions like this answered.
That said, we’ve had a few questions about this in our forum too (see below), you may find more information here: https://docs.pkp.sfu.ca/crossref-ojs-manual/en/references. Also, @edamasio, one of our great Ambassadors, posted some information about depositing references with OJS here: Plug-in reference linking OJS 3
I hope this answers your questions, if not the aforementioned PKP forum is a great resource.
Alternatively, you can always use our Simple Text Query forum to easily add references to any DOI. Full instructions on using this alternative method are available here: https://0-www-crossref-org.library.alliant.edu/education/retrieve-metadata/simple-text-query/#00392
Please let me know if you have any additional questions.
Kind regards,
Isaac