Tried to find a tool which can extract a page from a multi-page .djvu file, but failed. djvutoy in Windows may do that job, but no counterpart found in Linux.

So I use a circuitous way to do this job:

ddjvu -page=3 -format=tiff doc.djvu page.tiff
cjb2 page.tiff page.djvu


Then you can use page.djvu as a single-page .djvu file, which can be used in djvm, such as:

djvm -i doc.djvu page.djvu 10


This sets page.djvu as the 10th page in doc.djvu.