<?xml version="1.0" encoding="US-ASCII"?>
<dblp>
<article key="journals/ijcm/ChenW09" mdate="2017-05-28">
<author>Hon-Chan Chen</author>
<author>Fu-Hsing Wang</author>
<title>Additive tree 2-spanners of permutation graphs.</title>
<pages>1490-1497</pages>
<year>2009</year>
<volume>86</volume>
<journal>Int. J. Comput. Math.</journal>
<number>9</number>
<ee>https://doi.org/10.1080/00207160701828116</ee>
<url>db/journals/ijcm/ijcm86.html#ChenW09</url>
</article></dblp>
