In order to display bibliographies in Joomla articles, I've created a plugin called jBibHtml which allows authors to do just this. Using this plugin, an author can cite items from a bibtex file, and print the bibliography of citations at the end of the article. This plugin uses bibtex files as the source of citations, which are used often in the scientific community. It uses the LaTeX syntax for citations, so LaTeX users will find this plugin easy to use.