# How to insert slashed o “ø” into an author's name in my bibliography

In my bibliography I have a reference to an author with a Danish name: Nørregaard. The problem is that to do the slashed o I need to type `\o`. However, I can't do this `N\orregaard` and if I do this `N\o rregaard` then I get a space in the name. How do I solve this problem?

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You don't get a space if you type `N\o rregard`. – egreg Dec 10 '11 at 17:46
With the right input encoding you should be able to insert »ø« directly. – Thorsten Donig Dec 10 '11 at 18:13

When typing the name in the text, `N\o rregard` will not leave any space in the output, as spaces after control sequences (with name consisting of letters) are ignored.

However, in `.bib` file the question is slightly different, as you want to use the name also for collation. The BibTeX manual recommends

``````author = {N{\o}rregard, X.}
``````

because in this way the entire combination `{\o}` would be regarded simply as an "o". The typeset text will not have font dependent kerning between "N" and "ø" and between "ø" and "r". If you're using `biblatex`, then `Nørregard` is fine (as long as you use an input encoding where `ø` is present).

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What are required packages to get \$\o\$ in the main document? It would be nice to get a complete answer. – Masi Oct 15 '15 at 18:01
@Masi Why should you want ø in math mode? And for getting ø (with `\o`) in text mode no package is needed. – egreg Oct 15 '15 at 18:04
You are right! \$\emptyset\$ better. I thought you could do that wdth \o but not apparently. – Masi Oct 15 '15 at 18:07