Should we have a tag to identify questions concerning specific published papers?

I was just editing Trying to understand free-energy equations in a Karl Friston neuroscience article and thought it might be useful to have a tag identifying questions specifically concerning one or more published academic works.

Would this be useful, and if so, what would be a good name for the tag? It seems a bit similar to the [specific-question] tag on Meta, so comes to mind as a possibility; but maybe something more general like would be better.