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On the screenshot you can see that the ISBN number breaks the layout:

broken layout

How can I fix the layout?

On my small attatched example the layout is not so much demaged like in my real work but you will see also the problem.


\usepackage[english, ngerman]{babel}
\usepackage[backend=bibtex, natbib=true, citestyle=alphabetic, bibstyle=alphabetic]{biblatex}


Some info \cite{Hoehne2010}


And my bibtex file:

  title = {Verfahren zur Anonymisierung von Einzeldaten},
  publisher = {Statistisches Bundesamt},
  year = {2010},
  author = {Höhne, Jörg},
  series = {Statistik und Wissenschaft, Teil 16},
  address = {Wiesbaden},
  isbn = {9783824609017},
  type = {text},
  url = {http://www.destatis.de}
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up vote 14 down vote accepted

Long strings in bibliographies often give problems in line breaking. A "cheap" solution in this case is to use the hyphened form of the ISBN number:


This is the "official" style: the first group corresponds to "book publishing", the second is the language (3 is German); then come the publisher and the title; the last one is the check digit.

See here for a reference for this particular book. You can also check at the ISBN organization converter

Note: rekire has pointed me to another online resource:


that is also able to check with some databases for the corresponding book.

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