<?xml version="1.0"?>
<dblp>
<article key="journals/ijcga/Muller-HannemannS07" mdate="2008-06-23">
<author>Matthias M&#252;ller-Hannemann</author>
<author>Anna Schulze</author>
<title>Hardness and Approximation of Octilinear Steiner Trees.</title>
<pages>231-260</pages>
<year>2007</year>
<volume>17</volume>
<journal>Int. J. Comput. Geometry Appl.</journal>
<number>3</number>
<ee>http://dx.doi.org/10.1142/S021819590700232X</ee>
<url>db/journals/ijcga/ijcga17.html#Muller-HannemannS07</url>
</article>
</dblp>
