<?xml version="1.0"?>
<coauthors author="M. L&#246;hndorf" urlpt="l/L=ouml=hndorf:M=">
<author urlpt="h/Hackbusch:Wolfgang" count="1">Wolfgang Hackbusch</author>
<author urlpt="s/Sauter:S=_A=" count="1">S. A. Sauter</author>
</coauthors>
