Refering to another page in a wiki article

I have made an extension for writing scientific papers, with support for references in bibtex format via extra tags, one tag for refering to an external reference file (currently refering to a URL), a tag for putting references in the text, and one for placing the reference section. This is set up as a tool for cooperation with my colleagues.

There are several resons that I don't want to use the Cite extension package, the most important being that it interleaves the comments in the text which make it hard to reuse the biblography later, and because I and most I work with use external tools using the bibtex or endnote format for handling references, which don't work with inlined/interleaved comments.

Now I import the biblography via a URL, like <nowiki><bibtex src="http://www.somesite.com/biblo.bib"/></nowiki>. This works, but I would really like to get the biblography from another wiki page on the same server. I can use the URL-fetch method for that as well, but it would be a better idea to get it from within Mediawiki. I have not found any wikipedia extensions that does that. How would you do that.

-Gisle