Numerous programs have implemented cross-references and citations on top of Markdown. Similar discussions have not resulted in a standard syntax for cross-references and citations added to CommonMark: MultiMarkdown Cross References Header IDs Common base for Citations Existing implementations have a reasonably consistent syntax, including: pandoc citations extension and R Studio — [@bibKey] (e.g., [@doe99; @smith2000; @smith2004], [see @doe99, pp. 33-35 and *passim*; @smith04, chap. 1], [-@...
