<?xml version="1.0"?>
<dblp>
<article key="journals/ita/TangB91" mdate="2004-02-27">
<author>Shouwen Tang</author>
<author>Ronald V. Book</author>
<title>Reducibilities on tally and sparse sets.</title>
<pages>293-304</pages>
<year>1991</year>
<volume>25</volume>
<journal>ITA</journal>
<url>db/journals/ita/ita25.html#TangB91</url>
</article>
</dblp>
