<?xml version="1.0"?>
<dblp>
<article key="journals/tit/PietrobonUPC94" mdate="2004-12-30">
<author>Steven S. Pietrobon</author>
<author>Gottfried Ungerboeck</author>
<author>L. C. Perez</author>
<author>Daniel J. Costello Jr.</author>
<title>Rotationally invariant nonlinear trellis codes for two-dimensional modulation.</title>
<pages>1773-1791</pages>
<year>1994</year>
<volume>40</volume>
<journal>IEEE Transactions on Information Theory</journal>
<number>6</number>
<url>db/journals/tit/tit40.html#PietrobonUPC94</url>
</article>
</dblp>
