Pandocスタイルの引用
Pandocは、BibTeXファイルのキーを使用した自動引用をサポートするMarkdown形式を使用しています。フォーマットの例は次のとおりです。
Blah blah [@doe99]
Blah blah [@doe99, p.33]
Blah blah [see @doe99, pp. 33-35; also @smith04, ch. 1].
EmacsとPandoc/Markdown
There is a Pandoc-Mode for interacting with Pandoc through Emacs which can be combined with Markdown-Mode. Pandoc-Mode and Markdown-Mode don't support autocompletion of citations from bibtex files. A mode that has this kind of support for TeX files is Reftex. I am looking for a way to get Reftex-style autocompletion when editing Markdown files.
Autocompletion in other editors
There is a solution for Textmate: Autocomplete pandoc-style citations from a bibtex file in textmate.
The feature is also in Vim-Pandoc:
Autocompletion was implemented by hacking away at LaTeX Box's implementation of bibtex citation completion, even if the results don't look much like the original.