Added bibtex-completion-format-citation-org-cite.

README.org

@@ -7,6 +7,7 @@ Ivy-bibtex: [[http://melpa.org/#/ivy-bibtex][http://melpa.org/packages/ivy-bibte
 Helm-bibtex and ivy-bibtex allow you to search and manage your BibTeX bibliography.  They both share the same generic backend, bibtex-completion, but one uses the Helm completion framework and the other Ivy as a front-end.
 
 * News
+- 2021-07-18: Added a citation function for Org’s new citation system: ~bibtex-completion-format-citation-org-cite~ (for use in configuration variable ~bibtex-completion-format-citation-functions~)
 - 2021-04-12: Added a section below explaining how the bibliography can be automatically reloaded when PDFs and notes are added.  See [[https://github.com/tmalsburg/helm-bibtex#refresh-bibliography-when-new-pdfs-and-notes-are-added][here]].
 - 2021-04-08: It is now possible to search for entries with PDFs and notes by entering ~=has-pdf=~ and ~=has-note=~.
 - 2020-04-29: New commands ~helm-bibtex-with-notes~ and ~ivy-bibtex-with-noted~ for searching just within the entries that have notes.

bibtex-completion.el

@@ -122,7 +122,7 @@ ebib:key depending on the major mode of the current buffer.  Note
 that the functions should accept a list of keys as input.  With
 multiple marked entries one can insert multiple keys at once,
 e.g. \cite{key1,key2}.  See the functions
-`bibtex-completion-format-citation-ebib' and
+`bibtex-completion-format-citation-org-cite' and
 `bibtex-completion-format-citation-cite' as examples."
   :group 'bibtex-completion
   :type '(alist :key-type symbol :value-type function))
@@ -1047,6 +1047,12 @@ which no PDF is available are omitted."
                 for pdfs = (bibtex-completion-find-pdf key bibtex-completion-find-additional-pdfs)
                 append (with-no-warnings (--map (org-make-link-string it key) pdfs)))))
 
+(defun bibtex-completion-format-citation-org-cite (keys)
+  "Format org-links using Org mode's own cite syntax."
+  (format "[cite:%s]"
+    (s-join ";"
+            (--map (format "@%s" it) keys))))
+
 (defun bibtex-completion-format-citation-org-apa-link-to-PDF (keys)
   "Format org-links to PDF for entries in KEYS.
 Link text loosely follows APA format.  Uses first matching PDF if