Jacobs, Jürgen <br/><br/>
None  [electronic resource] 

 -  Oecologia  Jun 1970 
 - 96-126 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1432-1939 
<br/><br/><label>Standard No.: </label>10.1007/BF00347625  doi