<?xml version="1.0"?>
<dblp>
<article key="journals/jsc/KrystaP99" mdate="2003-11-19">
<author>Piotr Krysta</author>
<author>Leszek Pacholski</author>
<title>The STO problem is NP-complete.</title>
<pages>207-219</pages>
<year>1999</year>
<volume>27</volume>
<journal>J. Symb. Comput.</journal>
<number>2</number>
<url>db/journals/jsc/jsc27.html#KrystaP99</url>
</article>
</dblp>
