[Plugin: Zotpress] Insert bibliography using item IDs

I see it is possible to create bibliographies using various filters, or using the in-text citation shortcode. What about a logical third way: using item IDs?

What I want is to display one to five references in selected posts on my WP site. They are not actually cited in the posts, they are something like a “further reading” bibliography. How do I cite multiple items?

I tried the following:
[zotpress item="IE6ENTIT"]
But that doesn’t give me a way to specify multiple items. I don’t want to put them all in collections, though given how difficult this is turning out to be I might just tag those that belong together and display them that way.

Regardless, it seems to me that allowing one to build a bibliography of individual items should be possible.

http://ww.wp.xz.cn/extend/plugins/zotpress/