Force hardspace in multiple citations

Question

To cite multiple references, I'm using \cite{foo, bar}. Unfortunately, the second citation appears on a new page. Is there a way to force a hardspace between the two citations?

This is primarily a problem because a new section begins on page 29:

Answer 1

For a one-off final editing correction rather than changing the setting of all such citations you could use \mbox{\cite{foo,bar}} But I doubt there is enough flexibility in the shown line to find good line and page break in that case.

It might be better (if re-wording isn't an option) to allow the line to break there but use

\enlargethispage{\baselineskip}

To allow the 45] to stay on the page (on an extra line) and the section to start the next page. As the line is so short it won't interfere with the page number.