El-Maarry, M Ramy <br/><br/>
Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past.  [electronic resource] 

 -  Science (New York, N.Y.)  03 2017 
 - 1392-1395 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>1095-9203 
<br/><br/><label>Standard No.: </label>10.1126/science.aak9384  doi