Zheng, Huan <br/><br/>
The Trend of Labor Analgesia in the World and China: A Bibliometric Analysis of Publications in Recent 30 Years.  [electronic resource] 

 -  Journal of pain research  2020 
 - 517-526 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1178-7090 
<br/><br/><label>Standard No.: </label>10.2147/JPR.S232132  doi