Robinson, Richard <br/><br/>
After 40 years, retina reveals it uses positive feedback, as well as negative.  [electronic resource] 

 -  PLoS biology  May 2011 
 - e1001058 p.  digital 
<br/><br/> Publication Type: Comment; Journal Article 
<br/><br/><label>ISSN: </label>1545-7885 
<br/><br/><label>Standard No.: </label>10.1371/journal.pbio.1001058  doi