Matousek Jiri <br/><br/>
Using the Borsuk-Ulam theorem. 

 -  2003 
<br/><br/><label>Standard No.: </label>15001 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B316:25, P3