anchor.diff:  		 2005. Fast Structural Search in Phylogenetic Databases 
   		 <em>. Evolutionary Bioinformatics Online</em>, <strong>1</strong>: 37-46.
   	</p>
  -</div>+</div>
  
positive.code: <div class="gutter">
  	<h1>References</h1>
  	<p>
  		<strong>Blake, J. A., C. J. Bult, M. J. Donoghue, J. Humphries, and C. Fields.</strong> 
  		1994. Interoperability of biological databases: a meeting report. 
  
negative.code: 		 1996. The relationship between homoplasy and confidence in a phylogenetic tree. In: 
  		 <em>Homoplasy and the Evolutionary Process</em> (<strong>M. Sanderson and L. Hufford</strong>, eds.). 
  		 San Diego: Academic Press.
  	</p>
  	<p>
  		<strong>Shan, H., K. G. Herbert, W. H. Piel, D. Shasha and J. T. L. Wang.</strong>
  