<p>Li Z and Huang H (2013).
<em>GeneGA: Design gene based on both mRNA secondary structure and codon
usage bias using Genetic algorithm</em>.
R package version 1.20.0, <a href="http://www.tbi.univie.ac.at/~ivo/RNA/">http://www.tbi.univie.ac.at/~ivo/RNA/</a>. 
</p>
