You can install dk-bib from a lot of sources:
Development versions can be tracked on Github.
Usage of dk-bib is described in the manual (in danish).
Dk-bib is a translation of the four standard BibTeX style files (abbrv, alpha, plain and unsrt) and the apalike style file into Danish.
The files have been extended with URL, ISBN, ISSN, annote and printing fields which can be enabled through a LaTeX style file.
Dk-bib also comes with a couple of Danish sorting order files for BibTeX8.