If the bibtex citation is in the metadata of the publication item, you can do a GET item call to obtain the citation in the XML/JSON metadata.Â
Bear in mind that in order for you to obtain the bibtex citation, you would have to do a GET call to the specific item (/work/PUT-CODE) and not the work sections in general (/works). If you do a GET /works call, you will get a summarized response of all the work items of that record. This summarized response does not contain the bibtex citation.Â
<common:created-date>2022-04-10T12:53:45.064Z</common:created-date>
  <common:last-modified-date>2022-04-10T12:53:45.064Z</common:last-modified-date>
  <common:source>
    <common:source-client-id>
      <common:uri>
https://orcid.org/0000-0002-XXXX-XXXX</common:uri>
      <common:path>0000-0002-XXXX-XXXX</common:path>
      <common:host>
orcid.org</common:host>
    </common:source-client-id>
    <common:source-name>Europe PubMed Central</common:source-name>
    <common:assertion-origin-orcid>
      <common:uri>
https://orcid.org/client/0000-0002-XXXX-XXXX</common:uri>
      <common:path>0000-0003-XXXX-XXXX</common:path>
      <common:host>
orcid.org</common:host>
    </common:assertion-origin-orcid>
    <common:assertion-origin-name>John Doe</common:assertion-origin-name>
  </common:source>
  <work:title>
    <common:title>Work Title</common:title>
  </work:title>
  <work:journal-title>Journal Title</work:journal-title>
  <work:citation>
    <work:citation-type>bibtex</work:citation-type>
    <work:citation-value>@article{PMID:12345,
 title = {This is the Work Title.},
 author = {Author One, Author Two},
 doi = {10.12345/s1234},
 journal = {This is the Journal Title},
 month = {04},
 year = {2022}
}</work:citation-value>Â Â </work:citation>
  <work:type>journal-article</work:type>
  <common:publication-date>
    <common:year>2022</common:year>
    <common:month>04</common:month>
  </common:publication-date>
  <common:external-ids>
    <common:external-id>
      <common:external-id-type>pmid</common:external-id-type>
      <common:external-id-value>12345</common:external-id-value>
      <common:external-id-normalized transient="true">12345</common:external-id-normalized>
      <common:external-id-relationship>self</common:external-id-relationship>
    </common:external-id>
    <common:external-id>
      <common:external-id-type>doi</common:external-id-type>
      <common:external-id-value>10.12345/s1234</common:external-id-value>
      <common:external-id-normalized transient="true">10.12345/s1234</common:external-id-normalized>
      <common:external-id-url>
https://doi.org/10.12345/s1234</common:external-id-url>
      <common:external-id-relationship>self</common:external-id-relationship>
    </common:external-id>
  </common:external-ids>
  <common:url>
http://europepmc.org/abstract/med/12345</common:url>
  <work:contributors>
    <work:contributor>
      <work:credit-name>Contributor One</work:credit-name>
      <work:contributor-attributes>
        <work:contributor-sequence>first</work:contributor-sequence>
        <work:contributor-role>author</work:contributor-role>
      </work:contributor-attributes>
    </work:contributor>
    <work:contributor>
      <work:credit-name>Contributor Two</work:credit-name>
      <work:contributor-attributes>
        <work:contributor-sequence>first</work:contributor-sequence>
        <work:contributor-role>author</work:contributor-role>
      </work:contributor-attributes>
    </work:contributor>
    <work:contributor>
      <work:credit-name>Contributor Three</work:credit-name>
      <work:contributor-attributes>
        <work:contributor-sequence>first</work:contributor-sequence>
        <work:contributor-role>author</work:contributor-role>
      </work:contributor-attributes>
    </work:contributor>
  </work:contributors>
</work:work>