Wen, Wen <br/><br/>
Patent commons, thickets, and open source software entry by start-up firms / 
Wen Wen, Marco Ceccagnoli and Chris Forman 
 - Cambridge  NBER  2013 
 - 56p 
 - NBER Working Paper ;  19394 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>NBERWP 19394<br/>E10546.pdf