If you want to include items in the bibliography without actually
citing them in the body text, you can define a dummy nocite
metadata field and put the citations there:
---
nocite: |
@item1, @item2
...
@item3
In this example, the document will contain a citation for
item3 only, but the bibliography will contain entries for
item1, item2, and item3.
It is possible to create a bibliography with all the citations, whether or not they appear in the document, by using a wildcard:
---
nocite: |
@*
...
For LaTeX output, you can also use natbib or biblatex to render
the bibliography. In order to do so, specify bibliography files as
outlined above, and add the --natbib or
--biblatex argument to the pandoc invocation. Bear in mind
that bibliography files have to be in either BibTeX (for
--natbib) or BibLaTeX (for --biblatex)
format.