[NTG-context] bib question

Hi all, not really a question about specific code, but I need an idea: I have a fairly large bibliographical list which is generated from an even larger bibtex database. Now, I want to quote some of the items from this list on my slides, but I want to retain the original numbering in the list, like so: the list: [1] item A [2] item B [3] item C the slide: [2] item B [3] item C Can anyone suggest an approach for this? Or is this impossible with bibtex, and I have to typeset the slides manually? Thanks, and best Thomas