[NTG-context] publications in footnotes (new bibliography mkiv)

I have to prepare a paper in literary science. I need to be able to quote a reference in a footnote instead of a in-text reference. Such a footnote should look the same or similar as the entry in the publications list. I guess that I have to do \setupbtxcitevariant and \definebtxcitevariant but then I am stuck. It would be great if one could put a separate page number/range for every footnote. Is there maybe already a mechanism for that? Greetings Jörg