\cite spills over into the margin

Question

As you can see at the picture, a citation spills over into the margin of my paper. How can I resolve the issue?

Answer 1

Other users have suggested general methods to deal with bad line breaks, namely

• loading the microtype package (should be done before resorting to other measures);
• enclosing the problematic paragraph in a sloppypar environment;
• rephrasing the paragraph (note that – due to TeX's line-breaking algorithm – shifting a single word might do).

In the case of numerical citations, I also suggest to simply allow line breaks before them, i.e., to replace the non-breaking space at the start of ~\cite{<key>} with a normal space.

Answer 2

I actually have one more suggestion. It seems that the word before the \cite is in English, whereas the document is in Italian (thanks Guido to correcting me).

You can try adding this to your preamble (notice that the last language passed to babel is the default one):

\usepackage[english,italian]{babel}

Then, you can do the following that may help:

\foreignlanguage{english}{Telecommunications Union}~\cite{<key>}